31111412231 has 16 divisors (see below), whose sum is σ = 34183814400. Its totient is φ = 28183339008.

The previous prime is 31111412221. The next prime is 31111412239. The reversal of 31111412231 is 13221411113.

It is not a de Polignac number, because 31111412231 - 2¹⁸ = 31111150087 is a prime.

It is a super-2 number, since 2×31111412231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31111412239) 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, 1589255 + ... + 1608711.

It is an arithmetic number, because the mean of its divisors is an integer number (2136488400).

Almost surely, 2^31111412231 is an apocalyptic number.

31111412231 is a deficient number, since it is larger than the sum of its proper divisors (3072402169).

31111412231 is a wasteful number, since it uses less digits than its factorization.

31111412231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23158.

The product of its digits is 144, while the sum is 20.

Adding to 31111412231 its reverse (13221411113), we get a palindrome (44332823344).

The spelling of 31111412231 in words is "thirty-one billion, one hundred eleven million, four hundred twelve thousand, two hundred thirty-one".