31120113030321 has 16 divisors (see below), whose sum is σ = 48577737414528. Its totient is φ = 17349191932800.

The previous prime is 31120113030277. The next prime is 31120113030359. The reversal of 31120113030321 is 12303031102113.

It is a happy number.

It is not a de Polignac number, because 31120113030321 - 2¹³ = 31120113022129 is a prime.

It is a super-2 number, since 2×31120113030321² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31120113030361) 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, 18072074070 + ... + 18072075791.

It is an arithmetic number, because the mean of its divisors is an integer number (3036108588408).

Almost surely, 2^{31120113030321} is an apocalyptic number.

It is an amenable number.

31120113030321 is a deficient number, since it is larger than the sum of its proper divisors (17457624384207).

31120113030321 is a wasteful number, since it uses less digits than its factorization.

31120113030321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36144149912.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 31120113030321 its reverse (12303031102113), we get a palindrome (43423144132434).

The spelling of 31120113030321 in words is "thirty-one trillion, one hundred twenty billion, one hundred thirteen million, thirty thousand, three hundred twenty-one".