213103131131 has 32 divisors (see below), whose sum is σ = 240638791680. Its totient is φ = 187043875200.

The previous prime is 213103131119. The next prime is 213103131139. The reversal of 213103131131 is 131131301312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213103131131 is a prime.

It is a super-2 number, since 2×213103131131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213103131139) 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, 87443645 + ... + 87446081.

It is an arithmetic number, because the mean of its divisors is an integer number (7519962240).

Almost surely, 2^213103131131 is an apocalyptic number.

213103131131 is a deficient number, since it is larger than the sum of its proper divisors (27535660549).

213103131131 is a wasteful number, since it uses less digits than its factorization.

213103131131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4715.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 213103131131 its reverse (131131301312), we get a palindrome (344234432443).

The spelling of 213103131131 in words is "two hundred thirteen billion, one hundred three million, one hundred thirty-one thousand, one hundred thirty-one".