131211211356 has 36 divisors (see below), whose sum is σ = 331698276000. Its totient is φ = 43733708928.

The previous prime is 131211211291. The next prime is 131211211357. The reversal of 131211211356 is 653112112131.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211211357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 359220 + ... + 625668.

It is an arithmetic number, because the mean of its divisors is an integer number (9213841000).

Almost surely, 2^131211211356 is an apocalyptic number.

It is an amenable number.

131211211356 is an abundant number, since it is smaller than the sum of its proper divisors (200487064644).

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

131211211356 is a wasteful number, since it uses less digits than its factorization.

131211211356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280138 (or 280133 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

Adding to 131211211356 its reverse (653112112131), we get a palindrome (784323323487).

The spelling of 131211211356 in words is "one hundred thirty-one billion, two hundred eleven million, two hundred eleven thousand, three hundred fifty-six".