111321012231 has 64 divisors (see below), whose sum is σ = 194202570240. Its totient is φ = 62132728320.

The previous prime is 111321012227. The next prime is 111321012233. The reversal of 111321012231 is 132210123111.

111321012231 is a `hidden beast` number, since 111 + 321 + 0 + 1 + 2 + 231 = 666.

It is not a de Polignac number, because 111321012231 - 2² = 111321012227 is a prime.

It is a super-2 number, since 2×111321012231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111321012233) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1638520 + ... + 1705106.

It is an arithmetic number, because the mean of its divisors is an integer number (3034415160).

Almost surely, 2^111321012231 is an apocalyptic number.

111321012231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

111321012231 is a deficient number, since it is larger than the sum of its proper divisors (82881558009).

111321012231 is a wasteful number, since it uses less digits than its factorization.

111321012231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67053 (or 67047 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 111321012231 its reverse (132210123111), we get a palindrome (243531135342).

The spelling of 111321012231 in words is "one hundred eleven billion, three hundred twenty-one million, twelve thousand, two hundred thirty-one".