2112312111231 has 32 divisors (see below), whose sum is σ = 3309002113536. Its totient is φ = 1173404736000.

The previous prime is 2112312111181. The next prime is 2112312111241. The reversal of 2112312111231 is 1321112132112.

It is not a de Polignac number, because 2112312111231 - 2⁹ = 2112312110719 is a prime.

It is a super-2 number, since 2×2112312111231² (a number of 25 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 = 2112312111198 and 2112312111207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112312111241) 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, 4123405 + ... + 4607286.

It is an arithmetic number, because the mean of its divisors is an integer number (103406316048).

Almost surely, 2^{2112312111231} is an apocalyptic number.

2112312111231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2112312111231 is a deficient number, since it is larger than the sum of its proper divisors (1196690002305).

2112312111231 is a wasteful number, since it uses less digits than its factorization.

2112312111231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8731023.

The product of its digits is 144, while the sum is 21.

Adding to 2112312111231 its reverse (1321112132112), we get a palindrome (3433424243343).

The spelling of 2112312111231 in words is "two trillion, one hundred twelve billion, three hundred twelve million, one hundred eleven thousand, two hundred thirty-one".