31322123021 has 8 divisors (see below), whose sum is σ = 35800004160. Its totient is φ = 26845064928.

The previous prime is 31322122999. The next prime is 31322123033. The reversal of 31322123021 is 12032122313.

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 31322123021 - 2¹⁰ = 31322121997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31322122984 and 31322123002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31322120021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121931 + ... + 278408.

It is an arithmetic number, because the mean of its divisors is an integer number (4475000520).

Almost surely, 2^31322123021 is an apocalyptic number.

It is an amenable number.

31322123021 is a deficient number, since it is larger than the sum of its proper divisors (4477881139).

31322123021 is a wasteful number, since it uses less digits than its factorization.

31322123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411523.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31322123021 its reverse (12032122313), we get a palindrome (43354245334).

The spelling of 31322123021 in words is "thirty-one billion, three hundred twenty-two million, one hundred twenty-three thousand, twenty-one".