31224312334021 has 4 divisors (see below), whose sum is σ = 31224481300000. Its totient is φ = 31224143368044.

The previous prime is 31224312334009. The next prime is 31224312334063. The reversal of 31224312334021 is 12043321342213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31224312334021 - 2⁵ = 31224312333989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31224312334421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84205491 + ... + 84575488.

It is an arithmetic number, because the mean of its divisors is an integer number (7806120325000).

Almost surely, 2^{31224312334021} is an apocalyptic number.

It is an amenable number.

31224312334021 is a deficient number, since it is larger than the sum of its proper divisors (168965979).

31224312334021 is a wasteful number, since it uses less digits than its factorization.

31224312334021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168965978.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 31224312334021 its reverse (12043321342213), we get a palindrome (43267633676234).

The spelling of 31224312334021 in words is "thirty-one trillion, two hundred twenty-four billion, three hundred twelve million, three hundred thirty-four thousand, twenty-one".