112111111521 has 12 divisors (see below), whose sum is σ = 161948671872. Its totient is φ = 74735941176.

The previous prime is 112111111499. The next prime is 112111111537. The reversal of 112111111521 is 125111111211.

112111111521 is a `hidden beast` number, since 1 + 1 + 21 + 11 + 111 + 521 = 666.

It is not a de Polignac number, because 112111111521 - 2⁷ = 112111111393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 112111111494 and 112111111503.

It is not an unprimeable number, because it can be changed into a prime (112111110521) 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 11 ways as a sum of consecutive naturals, for example, 249061 + ... + 535026.

It is an arithmetic number, because the mean of its divisors is an integer number (13495722656).

Almost surely, 2^112111111521 is an apocalyptic number.

It is an amenable number.

112111111521 is a deficient number, since it is larger than the sum of its proper divisors (49837560351).

112111111521 is a wasteful number, since it uses less digits than its factorization.

112111111521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799980 (or 799977 counting only the distinct ones).

The product of its digits is 20, while the sum is 18.

Adding to 112111111521 its reverse (125111111211), we get a palindrome (237222222732).

The spelling of 112111111521 in words is "one hundred twelve billion, one hundred eleven million, one hundred eleven thousand, five hundred twenty-one".