231111103221212 has 12 divisors (see below), whose sum is σ = 404484605976360. Its totient is φ = 115544072942256.

The previous prime is 231111103221209. The next prime is 231111103221227. The reversal of 231111103221212 is 212122301111132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2869621787 + ... + 2869702322.

It is an arithmetic number, because the mean of its divisors is an integer number (33707050498030).

Almost surely, 2^{231111103221212} is an apocalyptic number.

It is an amenable number.

231111103221212 is a deficient number, since it is larger than the sum of its proper divisors (173373502755148).

231111103221212 is a wasteful number, since it uses less digits than its factorization.

231111103221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5739334180 (or 5739334178 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 231111103221212 its reverse (212122301111132), we get a palindrome (443233404332344).

The spelling of 231111103221212 in words is "two hundred thirty-one trillion, one hundred eleven billion, one hundred three million, two hundred twenty-one thousand, two hundred twelve".