23240122200221 has 4 divisors (see below), whose sum is σ = 23246612045244. Its totient is φ = 23233632355200.

The previous prime is 23240122200199. The next prime is 23240122200227. The reversal of 23240122200221 is 12200222104232.

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 14819504851321 + 8420617348900 = 3849611^2 + 2901830^2 .

It is a cyclic number.

It is not a de Polignac number, because 23240122200221 - 2²² = 23240118005917 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 (23240122200227) 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, 3244917140 + ... + 3244924301.

It is an arithmetic number, because the mean of its divisors is an integer number (5811653011311).

Almost surely, 2^{23240122200221} is an apocalyptic number.

It is an amenable number.

23240122200221 is a deficient number, since it is larger than the sum of its proper divisors (6489845023).

23240122200221 is an equidigital number, since it uses as much as digits as its factorization.

23240122200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6489845022.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 23240122200221 its reverse (12200222104232), we get a palindrome (35440344304453).

The spelling of 23240122200221 in words is "twenty-three trillion, two hundred forty billion, one hundred twenty-two million, two hundred thousand, two hundred twenty-one".