31322113121 has 8 divisors (see below), whose sum is σ = 33926488680. Its totient is φ = 28745592192.

The previous prime is 31322113037. The next prime is 31322113153. The reversal of 31322113121 is 12131122313.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 236544400 + 31085568721 = 15380^2 + 176311^2 .

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 31322113121 - 2¹⁴ = 31322096737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31322113093 and 31322113102.

It is not an unprimeable number, because it can be changed into a prime (31322113171) 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, 6961316 + ... + 6965813.

It is an arithmetic number, because the mean of its divisors is an integer number (4240811085).

Almost surely, 2^31322113121 is an apocalyptic number.

It is an amenable number.

31322113121 is a deficient number, since it is larger than the sum of its proper divisors (2604375559).

31322113121 is a wasteful number, since it uses less digits than its factorization.

31322113121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13927315.

The product of its digits is 216, while the sum is 20.

Adding to 31322113121 its reverse (12131122313), we get a palindrome (43453235434).

The spelling of 31322113121 in words is "thirty-one billion, three hundred twenty-two million, one hundred thirteen thousand, one hundred twenty-one".