3131301333221 has 16 divisors (see below), whose sum is σ = 3323429222400. Its totient is φ = 2944201494960.

The previous prime is 3131301333217. The next prime is 3131301333239. The reversal of 3131301333221 is 1223331031313.

It is a cyclic number.

It is not a de Polignac number, because 3131301333221 - 2² = 3131301333217 is a prime.

It is a super-2 number, since 2×3131301333221² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131301323221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3741425 + ... + 4501206.

It is an arithmetic number, because the mean of its divisors is an integer number (207714326400).

Almost surely, 2^{3131301333221} is an apocalyptic number.

It is an amenable number.

3131301333221 is a deficient number, since it is larger than the sum of its proper divisors (192127889179).

3131301333221 is a wasteful number, since it uses less digits than its factorization.

3131301333221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8242936.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 3131301333221 its reverse (1223331031313), we get a palindrome (4354632364534).

The spelling of 3131301333221 in words is "three trillion, one hundred thirty-one billion, three hundred one million, three hundred thirty-three thousand, two hundred twenty-one".