31022144021 has 16 divisors (see below), whose sum is σ = 34318287360. Its totient is φ = 27805605120.

The previous prime is 31022143991. The next prime is 31022144039. The reversal of 31022144021 is 12044122013.

It is a cyclic number.

It is not a de Polignac number, because 31022144021 - 2¹⁴ = 31022127637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31022143984 and 31022144002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31022144071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3072860 + ... + 3082938.

It is an arithmetic number, because the mean of its divisors is an integer number (2144892960).

Almost surely, 2^31022144021 is an apocalyptic number.

It is an amenable number.

31022144021 is a deficient number, since it is larger than the sum of its proper divisors (3296143339).

31022144021 is a wasteful number, since it uses less digits than its factorization.

31022144021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13996.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 31022144021 its reverse (12044122013), we get a palindrome (43066266034).

The spelling of 31022144021 in words is "thirty-one billion, twenty-two million, one hundred forty-four thousand, twenty-one".