111214023521 has 12 divisors (see below), whose sum is σ = 122378590320. Its totient is φ = 100779746760.

The previous prime is 111214023517. The next prime is 111214023527. The reversal of 111214023521 is 125320412111.

It is not a de Polignac number, because 111214023521 - 2² = 111214023517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111214023527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5522435 + ... + 5542536.

It is an arithmetic number, because the mean of its divisors is an integer number (10198215860).

Almost surely, 2^111214023521 is an apocalyptic number.

It is an amenable number.

111214023521 is a deficient number, since it is larger than the sum of its proper divisors (11164566799).

111214023521 is a wasteful number, since it uses less digits than its factorization.

111214023521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11065036 (or 11065013 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 111214023521 its reverse (125320412111), we get a palindrome (236534435632).

The spelling of 111214023521 in words is "one hundred eleven billion, two hundred fourteen million, twenty-three thousand, five hundred twenty-one".