31333131221201 has 16 divisors (see below), whose sum is σ = 33874605782784. Its totient is φ = 28871633965824.

The previous prime is 31333131221153. The next prime is 31333131221213. The reversal of 31333131221201 is 10212213133313.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31333131221201 is a prime.

It is a super-2 number, since 2×31333131221201² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31333131221101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36812585 + ... + 37654118.

It is an arithmetic number, because the mean of its divisors is an integer number (2117162861424).

Almost surely, 2^{31333131221201} is an apocalyptic number.

It is an amenable number.

31333131221201 is a deficient number, since it is larger than the sum of its proper divisors (2541474561583).

31333131221201 is a wasteful number, since it uses less digits than its factorization.

31333131221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74467240.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 31333131221201 its reverse (10212213133313), we get a palindrome (41545344354514).

The spelling of 31333131221201 in words is "thirty-one trillion, three hundred thirty-three billion, one hundred thirty-one million, two hundred twenty-one thousand, two hundred one".