111021222121120 has 96 divisors (see below), whose sum is σ = 274197351657600. Its totient is φ = 42399167247360.

The previous prime is 111021222121109. The next prime is 111021222121163. The reversal of 111021222121120 is 21121222120111.

It is a happy number.

It is a super-2 number, since 2×111021222121120² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25891570 + ... + 29873329.

It is an arithmetic number, because the mean of its divisors is an integer number (2856222413100).

Almost surely, 2^{111021222121120} is an apocalyptic number.

111021222121120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111021222121120 is an abundant number, since it is smaller than the sum of its proper divisors (163176129536480).

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

111021222121120 is a wasteful number, since it uses less digits than its factorization.

111021222121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55765478 (or 55765470 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111021222121120 its reverse (21121222120111), we get a palindrome (132142444241231).

The spelling of 111021222121120 in words is "one hundred eleven trillion, twenty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty".