31330211221121 has 8 divisors (see below), whose sum is σ = 31617765887400. Its totient is φ = 31042658764800.

The previous prime is 31330211221091. The next prime is 31330211221163. The reversal of 31330211221121 is 12112211203313.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 106478868721 + 31223732352400 = 326311^2 + 5587820^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31330211221121 - 2¹⁰ = 31330211220097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31330211221171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45350075 + ... + 46035743.

It is an arithmetic number, because the mean of its divisors is an integer number (3952220735925).

Almost surely, 2^{31330211221121} is an apocalyptic number.

It is an amenable number.

31330211221121 is a deficient number, since it is larger than the sum of its proper divisors (287554666279).

31330211221121 is a wasteful number, since it uses less digits than its factorization.

31330211221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104979.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 31330211221121 its reverse (12112211203313), we get a palindrome (43442422424434).

The spelling of 31330211221121 in words is "thirty-one trillion, three hundred thirty billion, two hundred eleven million, two hundred twenty-one thousand, one hundred twenty-one".