213131131301 has 4 divisors (see below), whose sum is σ = 232506688704. Its totient is φ = 193755573900.

The previous prime is 213131131267. The next prime is 213131131309. The reversal of 213131131301 is 103131131312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213131131301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213131131309) 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, 9687778685 + ... + 9687778706.

It is an arithmetic number, because the mean of its divisors is an integer number (58126672176).

Almost surely, 2^213131131301 is an apocalyptic number.

It is an amenable number.

213131131301 is a deficient number, since it is larger than the sum of its proper divisors (19375557403).

213131131301 is a wasteful number, since it uses less digits than its factorization.

213131131301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19375557402.

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

Adding to 213131131301 its reverse (103131131312), we get a palindrome (316262262613).

It can be divided in two parts, 2131311 and 31301, that added together give a palindrome (2162612).

The spelling of 213131131301 in words is "two hundred thirteen billion, one hundred thirty-one million, one hundred thirty-one thousand, three hundred one".