31022221013 has 8 divisors (see below), whose sum is σ = 35487328128. Its totient is φ = 26565454224.

The previous prime is 31022221007. The next prime is 31022221031. The reversal of 31022221013 is 31012222013.

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 31022221013 - 2²⁰ = 31021172437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31022220982 and 31022221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31022221073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2077106 + ... + 2091987.

It is an arithmetic number, because the mean of its divisors is an integer number (4435916016).

Almost surely, 2^31022221013 is an apocalyptic number.

It is an amenable number.

31022221013 is a deficient number, since it is larger than the sum of its proper divisors (4465107115).

31022221013 is a wasteful number, since it uses less digits than its factorization.

31022221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170163.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31022221013 its reverse (31012222013), we get a palindrome (62034443026).

The spelling of 31022221013 in words is "thirty-one billion, twenty-two million, two hundred twenty-one thousand, thirteen".