31220401303331 has 8 divisors (see below), whose sum is σ = 31518280051200. Its totient is φ = 30922635505608.

The previous prime is 31220401303277. The next prime is 31220401303367. The reversal of 31220401303331 is 13330310402213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31220401303331 - 2³⁰ = 31219327561507 is a prime.

It is a super-2 number, since 2×31220401303331² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31220401303331.

It is not an unprimeable number, because it can be changed into a prime (31220101303331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27682031 + ... + 28787768.

It is an arithmetic number, because the mean of its divisors is an integer number (3939785006400).

Almost surely, 2^{31220401303331} is an apocalyptic number.

31220401303331 is a deficient number, since it is larger than the sum of its proper divisors (297878747869).

31220401303331 is a wasteful number, since it uses less digits than its factorization.

31220401303331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56475073.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 31220401303331 its reverse (13330310402213), we get a palindrome (44550711705544).

The spelling of 31220401303331 in words is "thirty-one trillion, two hundred twenty billion, four hundred one million, three hundred three thousand, three hundred thirty-one".