131321202331 has 4 divisors (see below), whose sum is σ = 143259493464. Its totient is φ = 119382911200.

The previous prime is 131321202281. The next prime is 131321202359. The reversal of 131321202331 is 133202123131.

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 131321202331 - 2²¹ = 131319105179 is a prime.

It is a super-2 number, since 2×131321202331² (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 (131321202361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5969145550 + ... + 5969145571.

It is an arithmetic number, because the mean of its divisors is an integer number (35814873366).

Almost surely, 2^131321202331 is an apocalyptic number.

131321202331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131321202331 is a deficient number, since it is larger than the sum of its proper divisors (11938291133).

131321202331 is a wasteful number, since it uses less digits than its factorization.

131321202331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11938291132.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 131321202331 its reverse (133202123131), we get a palindrome (264523325462).

The spelling of 131321202331 in words is "one hundred thirty-one billion, three hundred twenty-one million, two hundred two thousand, three hundred thirty-one".