331000001321 has 48 divisors (see below), whose sum is σ = 401658808320. Its totient is φ = 271283443200.

The previous prime is 331000001317. The next prime is 331000001347. The reversal of 331000001321 is 123100000133.

It is not a de Polignac number, because 331000001321 - 2² = 331000001317 is a prime.

It is a super-2 number, since 2×331000001321² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331000001296 and 331000001305.

It is not an unprimeable number, because it can be changed into a prime (331000001351) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7554086 + ... + 7597776.

It is an arithmetic number, because the mean of its divisors is an integer number (8367891840).

Almost surely, 2^331000001321 is an apocalyptic number.

It is an amenable number.

331000001321 is a deficient number, since it is larger than the sum of its proper divisors (70658806999).

331000001321 is a wasteful number, since it uses less digits than its factorization.

331000001321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43886 (or 43875 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 331000001321 its reverse (123100000133), we get a palindrome (454100001454).

It can be divided in two parts, 33100000132 and 1, that added together give a palindrome (33100000133).

The spelling of 331000001321 in words is "three hundred thirty-one billion, one thousand, three hundred twenty-one".