213102131131 has 4 divisors (see below), whose sum is σ = 217122926112. Its totient is φ = 209081336152.

The previous prime is 213102131129. The next prime is 213102131147. The reversal of 213102131131 is 131131201312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213102131131 - 2¹ = 213102131129 is a prime.

It is a super-2 number, since 2×213102131131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213102131099 and 213102131108.

It is not an unprimeable number, because it can be changed into a prime (213102131101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2010397411 + ... + 2010397516.

It is an arithmetic number, because the mean of its divisors is an integer number (54280731528).

Almost surely, 2^213102131131 is an apocalyptic number.

213102131131 is a deficient number, since it is larger than the sum of its proper divisors (4020794981).

213102131131 is an equidigital number, since it uses as much as digits as its factorization.

213102131131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4020794980.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 213102131131 its reverse (131131201312), we get a palindrome (344233332443).

The spelling of 213102131131 in words is "two hundred thirteen billion, one hundred two million, one hundred thirty-one thousand, one hundred thirty-one".