23110121210021 has 4 divisors (see below), whose sum is σ = 23426698212972. Its totient is φ = 22793544207072.

The previous prime is 23110121209997. The next prime is 23110121210023. The reversal of 23110121210021 is 12001212101132.

It is a happy number.

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 13318923240100 + 9791197969921 = 3649510^2 + 3129089^2 .

It is a cyclic number.

It is not a de Polignac number, because 23110121210021 - 2⁶ = 23110121209957 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 (23110121210023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158288501366 + ... + 158288501511.

It is an arithmetic number, because the mean of its divisors is an integer number (5856674553243).

Almost surely, 2^{23110121210021} is an apocalyptic number.

It is an amenable number.

23110121210021 is a deficient number, since it is larger than the sum of its proper divisors (316577002951).

23110121210021 is an equidigital number, since it uses as much as digits as its factorization.

23110121210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316577002950.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 23110121210021 its reverse (12001212101132), we get a palindrome (35111333311153).

The spelling of 23110121210021 in words is "twenty-three trillion, one hundred ten billion, one hundred twenty-one million, two hundred ten thousand, twenty-one".