131211320212 has 24 divisors (see below), whose sum is σ = 262548861120. Its totient is φ = 56206375680.

The previous prime is 131211320131. The next prime is 131211320237. The reversal of 131211320212 is 212023112131.

It is a self number, because there is not a number n which added to its sum of digits gives 131211320212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1067662 + ... + 1184197.

It is an arithmetic number, because the mean of its divisors is an integer number (10939535880).

Almost surely, 2^131211320212 is an apocalyptic number.

It is an amenable number.

131211320212 is an abundant number, since it is smaller than the sum of its proper divisors (131337540908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131211320212 is a wasteful number, since it uses less digits than its factorization.

131211320212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2253951 (or 2253949 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131211320212 its reverse (212023112131), we get a palindrome (343234432343).

The spelling of 131211320212 in words is "one hundred thirty-one billion, two hundred eleven million, three hundred twenty thousand, two hundred twelve".