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1220101102220 = 2257111382773693
BaseRepresentation
bin10001110000010011101…
…100010101101010001100
311022122021221110220101212
4101300103230111222030
5124442231340232340
62332301240553552
7154102146152420
oct21602354255214
94278257426355
101220101102220
1143049529a770
121785694828b8
138b093c00a30
14430a600ab80
1521b0e777a65
hex11c13b15a8c

1220101102220 has 192 divisors, whose sum is σ = 3444379739136. Its totient is φ = 350608849920.

The previous prime is 1220101102183. The next prime is 1220101102243. The reversal of 1220101102220 is 222011010221.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1220101102195 and 1220101102204.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16519694 + ... + 16593386.

It is an arithmetic number, because the mean of its divisors is an integer number (17939477808).

Almost surely, 21220101102220 is an apocalyptic number.

1220101102220 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 1220101102220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1722189869568).

1220101102220 is an abundant number, since it is smaller than the sum of its proper divisors (2224278636916).

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

1220101102220 is a wasteful number, since it uses less digits than its factorization.

1220101102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74560 (or 74558 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1220101102220 its reverse (222011010221), we get a palindrome (1442112112441).

The spelling of 1220101102220 in words is "one trillion, two hundred twenty billion, one hundred one million, one hundred two thousand, two hundred twenty".