31223310231021 has 8 divisors (see below), whose sum is σ = 41633182860864. Its totient is φ = 20814488877600.

The previous prime is 31223310231007. The next prime is 31223310231023. The reversal of 31223310231021 is 12013201332213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31223310231021 - 2¹⁰ = 31223310229997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31223310230982 and 31223310231000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223310231023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262749801 + ... + 262868606.

It is an arithmetic number, because the mean of its divisors is an integer number (5204147857608).

Almost surely, 2^{31223310231021} is an apocalyptic number.

It is an amenable number.

31223310231021 is a deficient number, since it is larger than the sum of its proper divisors (10409872629843).

31223310231021 is a wasteful number, since it uses less digits than its factorization.

31223310231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525638211.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 31223310231021 its reverse (12013201332213), we get a palindrome (43236511563234).

The spelling of 31223310231021 in words is "thirty-one trillion, two hundred twenty-three billion, three hundred ten million, two hundred thirty-one thousand, twenty-one".