31023211302121 has 16 divisors (see below), whose sum is σ = 31934321139600. Its totient is φ = 30126123878400.

The previous prime is 31023211302113. The next prime is 31023211302163. The reversal of 31023211302121 is 12120311232013.

It can be written as a sum of positive squares in 8 ways, for example, as 4025460386025 + 26997750916096 = 2006355^2 + 5195936^2 .

It is a cyclic number.

It is not a de Polignac number, because 31023211302121 - 2³ = 31023211302113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31023211302092 and 31023211302101.

It is not an unprimeable number, because it can be changed into a prime (31023211302821) 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, 733936 + ... + 7911073.

It is an arithmetic number, because the mean of its divisors is an integer number (1995895071225).

Almost surely, 2^{31023211302121} is an apocalyptic number.

It is an amenable number.

31023211302121 is a deficient number, since it is larger than the sum of its proper divisors (911109837479).

31023211302121 is an equidigital number, since it uses as much as digits as its factorization.

31023211302121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8645820.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31023211302121 its reverse (12120311232013), we get a palindrome (43143522534134).

The spelling of 31023211302121 in words is "thirty-one trillion, twenty-three billion, two hundred eleven million, three hundred two thousand, one hundred twenty-one".