213121231402311 has 6 divisors (see below), whose sum is σ = 307841778692240. Its totient is φ = 142080820934868.

The previous prime is 213121231402301. The next prime is 213121231402367. The reversal of 213121231402311 is 113204132121312.

213121231402311 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 21 + 231 + 402 + 3 + 1 + 1 = 666.

213121231402311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213121231402311 - 2²² = 213121227208007 is a prime.

It is a super-2 number, since 2×213121231402311² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213121231402301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11840068411231 + ... + 11840068411248.

Almost surely, 2^{213121231402311} is an apocalyptic number.

213121231402311 is a deficient number, since it is larger than the sum of its proper divisors (94720547289929).

213121231402311 is a wasteful number, since it uses less digits than its factorization.

213121231402311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23680136822485 (or 23680136822482 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

Adding to 213121231402311 its reverse (113204132121312), we get a palindrome (326325363523623).

The spelling of 213121231402311 in words is "two hundred thirteen trillion, one hundred twenty-one billion, two hundred thirty-one million, four hundred two thousand, three hundred eleven".