31232123211 has 4 divisors (see below), whose sum is σ = 41642830952. Its totient is φ = 20821415472.

The previous prime is 31232123201. The next prime is 31232123249. The reversal of 31232123211 is 11232123213.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31232123211 - 2²⁷ = 31097905483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31232123201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5205353866 + ... + 5205353871.

It is an arithmetic number, because the mean of its divisors is an integer number (10410707738).

Almost surely, 2^31232123211 is an apocalyptic number.

31232123211 is a deficient number, since it is larger than the sum of its proper divisors (10410707741).

31232123211 is a wasteful number, since it uses less digits than its factorization.

31232123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10410707740.

The product of its digits is 432, while the sum is 21.

Adding to 31232123211 its reverse (11232123213), we get a palindrome (42464246424).

The spelling of 31232123211 in words is "thirty-one billion, two hundred thirty-two million, one hundred twenty-three thousand, two hundred eleven".