Search a number
-
+
1222112111220 = 223257111337183317
BaseRepresentation
bin10001110010001011100…
…011101110101001110100
311022211111002112202010200
4101302023203232221310
5130010341200024340
62333232555520500
7154203035355420
oct21621343565164
94284432482120
101222112111220
11431327476580
12178a2aa59130
138b324730ca0
144321712db80
1521bcb0b2330
hex11c8b8eea74

1222112111220 has 576 divisors, whose sum is σ = 5111879625216. Its totient is φ = 228074434560.

The previous prime is 1222112111179. The next prime is 1222112111237. The reversal of 1222112111220 is 221112112221.

1222112111220 is a `hidden beast` number, since 1 + 22 + 211 + 211 + 1 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1222112111193 and 1222112111202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 6575002 + ... + 6758318.

It is an arithmetic number, because the mean of its divisors is an integer number (8874791016).

Almost surely, 21222112111220 is an apocalyptic number.

1222112111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222112111220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2555939812608).

1222112111220 is an abundant number, since it is smaller than the sum of its proper divisors (3889767513996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222112111220 is a wasteful number, since it uses less digits than its factorization.

1222112111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183400 (or 183395 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1222112111220 its reverse (221112112221), we get a palindrome (1443224223441).

The spelling of 1222112111220 in words is "one trillion, two hundred twenty-two billion, one hundred twelve million, one hundred eleven thousand, two hundred twenty".