321131001400 has 48 divisors (see below), whose sum is σ = 814505000040. Its totient is φ = 116774908800.

The previous prime is 321131001383. The next prime is 321131001413. The reversal of 321131001400 is 4100131123.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72982119 + ... + 72986518.

Almost surely, 2^321131001400 is an apocalyptic number.

It is an amenable number.

321131001400 is an abundant number, since it is smaller than the sum of its proper divisors (493373998640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321131001400 is a wasteful number, since it uses less digits than its factorization.

321131001400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145968664 (or 145968655 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 321131001400 its reverse (4100131123), we get a palindrome (325231132523).

The spelling of 321131001400 in words is "three hundred twenty-one billion, one hundred thirty-one million, one thousand, four hundred".