31223010021 has 8 divisors (see below), whose sum is σ = 47577920064. Its totient is φ = 17841720000.

The previous prime is 31223010011. The next prime is 31223010031. The reversal of 31223010021 is 12001032213.

It is an interprime number because it is at equal distance from previous prime (31223010011) and next prime (31223010031).

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

It is not a de Polignac number, because 31223010021 - 2¹¹ = 31223007973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223010011) 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, 743404980 + ... + 743405021.

It is an arithmetic number, because the mean of its divisors is an integer number (5947240008).

Almost surely, 2^31223010021 is an apocalyptic number.

It is an amenable number.

31223010021 is a deficient number, since it is larger than the sum of its proper divisors (16354910043).

31223010021 is a wasteful number, since it uses less digits than its factorization.

31223010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486810011.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31223010021 its reverse (12001032213), we get a palindrome (43224042234).

The spelling of 31223010021 in words is "thirty-one billion, two hundred twenty-three million, ten thousand, twenty-one".