111121332231 has 32 divisors (see below), whose sum is σ = 182430545920. Its totient is φ = 58588510464.

The previous prime is 111121332181. The next prime is 111121332239. The reversal of 111121332231 is 132233121111.

It is not a de Polignac number, because 111121332231 - 2¹⁹ = 111120807943 is a prime.

It is a super-2 number, since 2×111121332231² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 111121332198 and 111121332207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121332239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 565155 + ... + 735963.

It is an arithmetic number, because the mean of its divisors is an integer number (5700954560).

Almost surely, 2^111121332231 is an apocalyptic number.

111121332231 is a deficient number, since it is larger than the sum of its proper divisors (71309213689).

111121332231 is a wasteful number, since it uses less digits than its factorization.

111121332231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173215.

The product of its digits is 216, while the sum is 21.

Adding to 111121332231 its reverse (132233121111), we get a palindrome (243354453342).

The spelling of 111121332231 in words is "one hundred eleven billion, one hundred twenty-one million, three hundred thirty-two thousand, two hundred thirty-one".