131311211202 has 48 divisors (see below), whose sum is σ = 288139890168. Its totient is φ = 43214054400.

The previous prime is 131311211197. The next prime is 131311211237. The reversal of 131311211202 is 202112113131.

131311211202 is a `hidden beast` number, since 131 + 311 + 21 + 1 + 202 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 131305494321 + 5716881 = 362361^2 + 2391^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 539448 + ... + 744060.

Almost surely, 2^131311211202 is an apocalyptic number.

131311211202 is an abundant number, since it is smaller than the sum of its proper divisors (156828678966).

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

131311211202 is a wasteful number, since it uses less digits than its factorization.

131311211202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205075 (or 205072 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 131311211202 its reverse (202112113131), we get a palindrome (333423324333).

The spelling of 131311211202 in words is "one hundred thirty-one billion, three hundred eleven million, two hundred eleven thousand, two hundred two".