212021131311 has 80 divisors (see below), whose sum is σ = 366450974208. Its totient is φ = 120895156800.

The previous prime is 212021131303. The next prime is 212021131313. The reversal of 212021131311 is 113131120212.

212021131311 is a `hidden beast` number, since 21 + 202 + 1 + 131 + 311 = 666.

It is not a de Polignac number, because 212021131311 - 2³ = 212021131303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021131313) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1165270 + ... + 1334876.

Almost surely, 2^212021131311 is an apocalyptic number.

212021131311 is a deficient number, since it is larger than the sum of its proper divisors (154429842897).

212021131311 is a wasteful number, since it uses less digits than its factorization.

212021131311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169714 (or 169705 counting only the distinct ones).

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

Adding to 212021131311 its reverse (113131120212), we get a palindrome (325152251523).

The spelling of 212021131311 in words is "two hundred twelve billion, twenty-one million, one hundred thirty-one thousand, three hundred eleven".