31120012220009 has 4 divisors (see below), whose sum is σ = 31326105016320. Its totient is φ = 30913919423700.

The previous prime is 31120012219991. The next prime is 31120012220039. The reversal of 31120012220009 is 90002221002113.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-31120012220009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31120012220039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103046397929 + ... + 103046398230.

It is an arithmetic number, because the mean of its divisors is an integer number (7831526254080).

Almost surely, 2^{31120012220009} is an apocalyptic number.

It is an amenable number.

31120012220009 is a deficient number, since it is larger than the sum of its proper divisors (206092796311).

31120012220009 is a wasteful number, since it uses less digits than its factorization.

31120012220009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206092796310.

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

The spelling of 31120012220009 in words is "thirty-one trillion, one hundred twenty billion, twelve million, two hundred twenty thousand, nine".