12312021111 has 32 divisors (see below), whose sum is σ = 17799936000. Its totient is φ = 7524883584.

The previous prime is 12312021091. The next prime is 12312021119. The reversal of 12312021111 is 11112021321.

It is not a de Polignac number, because 12312021111 - 2⁹ = 12312020599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312021119) 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, 4338385 + ... + 4341221.

It is an arithmetic number, because the mean of its divisors is an integer number (556248000).

Almost surely, 2^12312021111 is an apocalyptic number.

12312021111 is a deficient number, since it is larger than the sum of its proper divisors (5487914889).

12312021111 is a wasteful number, since it uses less digits than its factorization.

12312021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 12312021111 its reverse (11112021321), we get a palindrome (23424042432).

The spelling of 12312021111 in words is "twelve billion, three hundred twelve million, twenty-one thousand, one hundred eleven".