331131011220131 has 4 divisors (see below), whose sum is σ = 331313855513064. Its totient is φ = 330948166927200.

The previous prime is 331131011220073. The next prime is 331131011220197. The reversal of 331131011220131 is 131022110131133.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331131011220131 is a prime.

It is a super-2 number, since 2×331131011220131² (a number of 30 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 = 331131011220097 and 331131011220106.

It is not an unprimeable number, because it can be changed into a prime (331131011220931) 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, 91422143750 + ... + 91422147371.

It is an arithmetic number, because the mean of its divisors is an integer number (82828463878266).

Almost surely, 2^{331131011220131} is an apocalyptic number.

331131011220131 is a deficient number, since it is larger than the sum of its proper divisors (182844292933).

331131011220131 is a wasteful number, since it uses less digits than its factorization.

331131011220131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182844292932.

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 331131011220131 its reverse (131022110131133), we get a palindrome (462153121351264).

The spelling of 331131011220131 in words is "three hundred thirty-one trillion, one hundred thirty-one billion, eleven million, two hundred twenty thousand, one hundred thirty-one".