213021310131 has 32 divisors (see below), whose sum is σ = 361216857600. Its totient is φ = 121542236640.

The previous prime is 213021310127. The next prime is 213021310133. The reversal of 213021310131 is 131013120312.

213021310131 is a `hidden beast` number, since 21 + 302 + 1 + 310 + 1 + 31 = 666.

It is not a de Polignac number, because 213021310131 - 2² = 213021310127 is a prime.

It is a super-2 number, since 2×213021310131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213021310133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 727641 + ... + 977498.

It is an arithmetic number, because the mean of its divisors is an integer number (11288026800).

Almost surely, 2^213021310131 is an apocalyptic number.

213021310131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

213021310131 is a deficient number, since it is larger than the sum of its proper divisors (148195547469).

213021310131 is a wasteful number, since it uses less digits than its factorization.

213021310131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705816 (or 1705810 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 213021310131 its reverse (131013120312), we get a palindrome (344034430443).

The spelling of 213021310131 in words is "two hundred thirteen billion, twenty-one million, three hundred ten thousand, one hundred thirty-one".