31232221232021 has 16 divisors (see below), whose sum is σ = 31833081103680. Its totient is φ = 30631792638720.

The previous prime is 31232221231969. The next prime is 31232221232053. The reversal of 31232221232021 is 12023212223213.

It is a cyclic number.

It is not a de Polignac number, because 31232221232021 - 2²² = 31232217037717 is a prime.

It is a super-2 number, since 2×31232221232021² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31232226232021) 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, 2908293470 + ... + 2908304208.

It is an arithmetic number, because the mean of its divisors is an integer number (1989567568980).

Almost surely, 2^{31232221232021} is an apocalyptic number.

It is an amenable number.

31232221232021 is a deficient number, since it is larger than the sum of its proper divisors (600859871659).

31232221232021 is a wasteful number, since it uses less digits than its factorization.

31232221232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25636.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 31232221232021 its reverse (12023212223213), we get a palindrome (43255433455234).

The spelling of 31232221232021 in words is "thirty-one trillion, two hundred thirty-two billion, two hundred twenty-one million, two hundred thirty-two thousand, twenty-one".