31313310330221 has 16 divisors (see below), whose sum is σ = 32749672032000. Its totient is φ = 29883253665408.

The previous prime is 31313310330149. The next prime is 31313310330233. The reversal of 31313310330221 is 12203301331313.

It is not a de Polignac number, because 31313310330221 - 2¹⁴ = 31313310313837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313310330241) 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, 21460895 + ... + 22873491.

It is an arithmetic number, because the mean of its divisors is an integer number (2046854502000).

Almost surely, 2^{31313310330221} is an apocalyptic number.

It is an amenable number.

31313310330221 is a deficient number, since it is larger than the sum of its proper divisors (1436361701779).

31313310330221 is a wasteful number, since it uses less digits than its factorization.

31313310330221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414828.

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

Adding to 31313310330221 its reverse (12203301331313), we get a palindrome (43516611661534).

The spelling of 31313310330221 in words is "thirty-one trillion, three hundred thirteen billion, three hundred ten million, three hundred thirty thousand, two hundred twenty-one".