31120311320121 has 16 divisors (see below), whose sum is σ = 41667234785280. Its totient is φ = 20660259451920.

The previous prime is 31120311320081. The next prime is 31120311320141. The reversal of 31120311320121 is 12102311302113.

It is not a de Polignac number, because 31120311320121 - 2⁶ = 31120311320057 is a prime.

It is a super-2 number, since 2×31120311320121² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31120311320141) 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, 15082155 + ... + 17020928.

It is an arithmetic number, because the mean of its divisors is an integer number (2604202174080).

Almost surely, 2^{31120311320121} is an apocalyptic number.

It is an amenable number.

31120311320121 is a deficient number, since it is larger than the sum of its proper divisors (10546923465159).

31120311320121 is a wasteful number, since it uses less digits than its factorization.

31120311320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32104436.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 31120311320121 its reverse (12102311302113), we get a palindrome (43222622622234).

The spelling of 31120311320121 in words is "thirty-one trillion, one hundred twenty billion, three hundred eleven million, three hundred twenty thousand, one hundred twenty-one".