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1222100121121 = 11210100001001
BaseRepresentation
bin10001110010001010110…
…101111111011000100001
311022211110020222120210221
4101302022311333120201
5130010330112333441
62333231450523041
7154202531430025
oct21621265773041
94284406876727
101222100121121
11431320727200
12178a26a36481
138b3220c3659
14432156cc385
1521bc9ee48d1
hex11c8ad7f621

1222100121121 has 6 divisors (see below), whose sum is σ = 1343300133266. Its totient is φ = 1111000110000.

The previous prime is 1222100121119. The next prime is 1222100121131. The reversal of 1222100121121 is 1211210012221.

It can be written as a sum of positive squares in only one way, i.e., 794881016721 + 427219104400 = 891561^2 + 653620^2 .

It is not a de Polignac number, because 1222100121121 - 21 = 1222100121119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222100121095 and 1222100121104.

It is not an unprimeable number, because it can be changed into a prime (1222100121101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5050000380 + ... + 5050000621.

Almost surely, 21222100121121 is an apocalyptic number.

1222100121121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1222100121121 is a deficient number, since it is larger than the sum of its proper divisors (121200012145).

1222100121121 is a wasteful number, since it uses less digits than its factorization.

1222100121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100001023 (or 10100001012 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1222100121121 its reverse (1211210012221), we get a palindrome (2433310133342).

The spelling of 1222100121121 in words is "one trillion, two hundred twenty-two billion, one hundred million, one hundred twenty-one thousand, one hundred twenty-one".

Divisors: 1 11 121 10100001001 111100011011 1222100121121