331131320201 has 24 divisors (see below), whose sum is σ = 386225217000. Its totient is φ = 282700154880.

The previous prime is 331131320197. The next prime is 331131320209. The reversal of 331131320201 is 102023131133.

It can be written as a sum of positive squares in 4 ways, for example, as 69318991225 + 261812328976 = 263285^2 + 511676^2 .

It is not a de Polignac number, because 331131320201 - 2² = 331131320197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331131320209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 763925 + ... + 1116173.

It is an arithmetic number, because the mean of its divisors is an integer number (16092717375).

Almost surely, 2^331131320201 is an apocalyptic number.

It is an amenable number.

331131320201 is a deficient number, since it is larger than the sum of its proper divisors (55093896799).

331131320201 is a wasteful number, since it uses less digits than its factorization.

331131320201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352745 (or 352734 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 331131320201 its reverse (102023131133), we get a palindrome (433154451334).

The spelling of 331131320201 in words is "three hundred thirty-one billion, one hundred thirty-one million, three hundred twenty thousand, two hundred one".