111120223121 has 16 divisors (see below), whose sum is σ = 118272182400. Its totient is φ = 104037443328.

The previous prime is 111120223079. The next prime is 111120223133. The reversal of 111120223121 is 121322021111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111120223121 - 2³⁴ = 93940353937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 111120223121.

It is not an unprimeable number, because it can be changed into a prime (111120223141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4749470 + ... + 4772808.

It is an arithmetic number, because the mean of its divisors is an integer number (7392011400).

Almost surely, 2^111120223121 is an apocalyptic number.

It is an amenable number.

111120223121 is a deficient number, since it is larger than the sum of its proper divisors (7151959279).

111120223121 is a wasteful number, since it uses less digits than its factorization.

111120223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24808.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111120223121 its reverse (121322021111), we get a palindrome (232442244232).

The spelling of 111120223121 in words is "one hundred eleven billion, one hundred twenty million, two hundred twenty-three thousand, one hundred twenty-one".