23110421200021 has 4 divisors (see below), whose sum is σ = 23160991049932. Its totient is φ = 23059851350112.

The previous prime is 23110421200019. The next prime is 23110421200033. The reversal of 23110421200021 is 12000212401132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12016026019396 + 11094395180625 = 3466414^2 + 3330825^2 .

It is a cyclic number.

It is not a de Polignac number, because 23110421200021 - 2¹ = 23110421200019 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 (23110421200091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25284924270 + ... + 25284925183.

It is an arithmetic number, because the mean of its divisors is an integer number (5790247762483).

Almost surely, 2^{23110421200021} is an apocalyptic number.

It is an amenable number.

23110421200021 is a deficient number, since it is larger than the sum of its proper divisors (50569849911).

23110421200021 is an equidigital number, since it uses as much as digits as its factorization.

23110421200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50569849910.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 23110421200021 its reverse (12000212401132), we get a palindrome (35110633601153).

The spelling of 23110421200021 in words is "twenty-three trillion, one hundred ten billion, four hundred twenty-one million, two hundred thousand, twenty-one".