131231003211 has 60 divisors (see below), whose sum is σ = 241239038040. Its totient is φ = 68171826240.

The previous prime is 131231003207. The next prime is 131231003213. The reversal of 131231003211 is 112300132131.

131231003211 is a `hidden beast` number, since 1 + 31 + 2 + 310 + 0 + 321 + 1 = 666.

It is not a de Polignac number, because 131231003211 - 2² = 131231003207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131231003213) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 38346 + ... + 513743.

It is an arithmetic number, because the mean of its divisors is an integer number (4020650634).

Almost surely, 2^131231003211 is an apocalyptic number.

131231003211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131231003211 is a deficient number, since it is larger than the sum of its proper divisors (110008034829).

131231003211 is an equidigital number, since it uses as much as digits as its factorization.

131231003211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552134 (or 552110 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 131231003211 its reverse (112300132131), we get a palindrome (243531135342).

The spelling of 131231003211 in words is "one hundred thirty-one billion, two hundred thirty-one million, three thousand, two hundred eleven".