31320021022 has 16 divisors (see below), whose sum is σ = 48445443072. Its totient is φ = 15178010040.

The previous prime is 31320021017. The next prime is 31320021071. The reversal of 31320021022 is 22012002313.

It is a junction number, because it is equal to n+sod(n) for n = 31320020987 and 31320021005.

It is a congruent number.

It is an unprimeable number.

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, 1607754 + ... + 1627117.

It is an arithmetic number, because the mean of its divisors is an integer number (3027840192).

Almost surely, 2^31320021022 is an apocalyptic number.

31320021022 is a deficient number, since it is larger than the sum of its proper divisors (17125422050).

31320021022 is a wasteful number, since it uses less digits than its factorization.

31320021022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3235023.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31320021022 its reverse (22012002313), we get a palindrome (53332023335).

The spelling of 31320021022 in words is "thirty-one billion, three hundred twenty million, twenty-one thousand, twenty-two".