31301220213 has 12 divisors (see below), whose sum is σ = 45214535808. Its totient is φ = 20866713000.

The previous prime is 31301220193. The next prime is 31301220253. The reversal of 31301220213 is 31202210313.

It is not a de Polignac number, because 31301220213 - 2¹⁸ = 31300958069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301220253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 308956 + ... + 397562.

It is an arithmetic number, because the mean of its divisors is an integer number (3767877984).

Almost surely, 2^31301220213 is an apocalyptic number.

It is an amenable number.

31301220213 is a deficient number, since it is larger than the sum of its proper divisors (13913315595).

31301220213 is a wasteful number, since it uses less digits than its factorization.

31301220213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127864 (or 127861 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31301220213 its reverse (31202210313), we get a palindrome (62503430526).

The spelling of 31301220213 in words is "thirty-one billion, three hundred one million, two hundred twenty thousand, two hundred thirteen".