31120132021 has 4 divisors (see below), whose sum is σ = 33949234944. Its totient is φ = 28291029100.

The previous prime is 31120132007. The next prime is 31120132031. The reversal of 31120132021 is 12023102113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31120132021 - 2⁵ = 31120131989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31120131986 and 31120132004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120132031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1414551445 + ... + 1414551466.

It is an arithmetic number, because the mean of its divisors is an integer number (8487308736).

Almost surely, 2^31120132021 is an apocalyptic number.

It is an amenable number.

31120132021 is a deficient number, since it is larger than the sum of its proper divisors (2829102923).

31120132021 is a wasteful number, since it uses less digits than its factorization.

31120132021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829102922.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31120132021 its reverse (12023102113), we get a palindrome (43143234134).

The spelling of 31120132021 in words is "thirty-one billion, one hundred twenty million, one hundred thirty-two thousand, twenty-one".