3131323013221 has 8 divisors (see below), whose sum is σ = 3372876299520. Its totient is φ = 2889867196272.

The previous prime is 3131323013191. The next prime is 3131323013243. The reversal of 3131323013221 is 1223103231313.

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 3131323013221 - 2³⁹ = 2581567199333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131323013321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24300601 + ... + 24429118.

It is an arithmetic number, because the mean of its divisors is an integer number (421609537440).

Almost surely, 2^{3131323013221} is an apocalyptic number.

It is an amenable number.

3131323013221 is a deficient number, since it is larger than the sum of its proper divisors (241553286299).

3131323013221 is a wasteful number, since it uses less digits than its factorization.

3131323013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48734675.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 3131323013221 its reverse (1223103231313), we get a palindrome (4354426244534).

The spelling of 3131323013221 in words is "three trillion, one hundred thirty-one billion, three hundred twenty-three million, thirteen thousand, two hundred twenty-one".