23320120100021 has 4 divisors (see below), whose sum is σ = 23320129764012. Its totient is φ = 23320110436032.

The previous prime is 23320120100003. The next prime is 23320120100023. The reversal of 23320120100021 is 12000102102332.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7492564935025 + 15827555164996 = 2737255^2 + 3978386^2 .

It is a cyclic number.

It is not a de Polignac number, because 23320120100021 - 2¹⁰ = 23320120098997 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 (23320120100023) 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, 2164751 + ... + 7164243.

It is an arithmetic number, because the mean of its divisors is an integer number (5830032441003).

Almost surely, 2^{23320120100021} is an apocalyptic number.

It is an amenable number.

23320120100021 is a deficient number, since it is larger than the sum of its proper divisors (9663991).

23320120100021 is an equidigital number, since it uses as much as digits as its factorization.

23320120100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9663990.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 23320120100021 its reverse (12000102102332), we get a palindrome (35320222202353).

The spelling of 23320120100021 in words is "twenty-three trillion, three hundred twenty billion, one hundred twenty million, one hundred thousand, twenty-one".