31232212221021 has 16 divisors (see below), whose sum is σ = 47789419379328. Its totient is φ = 17772924556800.

The previous prime is 31232212220983. The next prime is 31232212221037. The reversal of 31232212221021 is 12012221223213.

It is not a de Polignac number, because 31232212221021 - 2¹⁸ = 31232211958877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31232212220982 and 31232212221000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31232212226021) 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, 3085572120 + ... + 3085582241.

It is an arithmetic number, because the mean of its divisors is an integer number (2986838711208).

Almost surely, 2^{31232212221021} is an apocalyptic number.

It is an amenable number.

31232212221021 is a deficient number, since it is larger than the sum of its proper divisors (16557207158307).

31232212221021 is a wasteful number, since it uses less digits than its factorization.

31232212221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6171154612.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 31232212221021 its reverse (12012221223213), we get a palindrome (43244433444234).

The spelling of 31232212221021 in words is "thirty-one trillion, two hundred thirty-two billion, two hundred twelve million, two hundred twenty-one thousand, twenty-one".