321031204045 has 16 divisors (see below), whose sum is σ = 385910910000. Its totient is φ = 256376291328.

The previous prime is 321031204001. The next prime is 321031204057. The reversal of 321031204045 is 540402130123.

It can be written as a sum of positive squares in 8 ways, for example, as 90690720201 + 230340483844 = 301149^2 + 479938^2 .

It is a cyclic number.

It is not a de Polignac number, because 321031204045 - 2²⁵ = 320997649613 is a prime.

It is a super-2 number, since 2×321031204045² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9168231 + ... + 9203179.

It is an arithmetic number, because the mean of its divisors is an integer number (24119431875).

Almost surely, 2^321031204045 is an apocalyptic number.

It is an amenable number.

321031204045 is a deficient number, since it is larger than the sum of its proper divisors (64879705955).

321031204045 is a wasteful number, since it uses less digits than its factorization.

321031204045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38112.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 321031204045 its reverse (540402130123), we get a palindrome (861433334168).

The spelling of 321031204045 in words is "three hundred twenty-one billion, thirty-one million, two hundred four thousand, forty-five".