31300321121 has 6 divisors (see below), whose sum is σ = 32720374050. Its totient is φ = 29939437088.

The previous prime is 31300321109. The next prime is 31300321123. The reversal of 31300321121 is 12112300313.

It can be written as a sum of positive squares in only one way, i.e., 17308033600 + 13992287521 = 131560^2 + 118289^2 .

It is not a de Polignac number, because 31300321121 - 2¹⁰ = 31300320097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31300321121.

It is not an unprimeable number, because it can be changed into a prime (31300321123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29583896 + ... + 29584953.

It is an arithmetic number, because the mean of its divisors is an integer number (5453395675).

Almost surely, 2^31300321121 is an apocalyptic number.

It is an amenable number.

31300321121 is a deficient number, since it is larger than the sum of its proper divisors (1420052929).

31300321121 is an equidigital number, since it uses as much as digits as its factorization.

31300321121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59168895 (or 59168872 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31300321121 its reverse (12112300313), we get a palindrome (43412621434).

The spelling of 31300321121 in words is "thirty-one billion, three hundred million, three hundred twenty-one thousand, one hundred twenty-one".