31023200123021 has 8 divisors (see below), whose sum is σ = 31272974146560. Its totient is φ = 30773511988128.

The previous prime is 31023200122963. The next prime is 31023200123033. The reversal of 31023200123021 is 12032100232013.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31023200123021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31023200122984 and 31023200123002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023200923021) 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 7 ways as a sum of consecutive naturals, for example, 20746751 + ... + 22191756.

It is an arithmetic number, because the mean of its divisors is an integer number (3909121768320).

Almost surely, 2^{31023200123021} is an apocalyptic number.

It is an amenable number.

31023200123021 is a deficient number, since it is larger than the sum of its proper divisors (249774023539).

31023200123021 is a wasteful number, since it uses less digits than its factorization.

31023200123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42944323.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31023200123021 its reverse (12032100232013), we get a palindrome (43055300355034).

The spelling of 31023200123021 in words is "thirty-one trillion, twenty-three billion, two hundred million, one hundred twenty-three thousand, twenty-one".