111021011121 has 16 divisors (see below), whose sum is σ = 156778070400. Its totient is φ = 69641342208.

The previous prime is 111021011111. The next prime is 111021011191. The reversal of 111021011121 is 121110120111.

It is not a de Polignac number, because 111021011121 - 2⁹ = 111021010609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111021011097 and 111021011106.

It is not an unprimeable number, because it can be changed into a prime (111021011111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104301 + ... + 482618.

It is an arithmetic number, because the mean of its divisors is an integer number (9798629400).

Almost surely, 2^111021011121 is an apocalyptic number.

It is an amenable number.

111021011121 is a deficient number, since it is larger than the sum of its proper divisors (45757059279).

111021011121 is a wasteful number, since it uses less digits than its factorization.

111021011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590648.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111021011121 its reverse (121110120111), we get a palindrome (232131131232).

The spelling of 111021011121 in words is "one hundred eleven billion, twenty-one million, eleven thousand, one hundred twenty-one".