23123101322221 has 2 divisors, whose sum is σ = 23123101322222. Its totient is φ = 23123101322220.

The previous prime is 23123101322207. The next prime is 23123101322239. The reversal of 23123101322221 is 12222310132132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18983544854121 + 4139556468100 = 4357011^2 + 2034590^2 .

It is a cyclic number.

It is not a de Polignac number, because 23123101322221 - 2³⁹ = 22573345508333 is a prime.

It is a super-3 number, since 3×23123101322221³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23123101322281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11561550661110 + 11561550661111.

It is an arithmetic number, because the mean of its divisors is an integer number (11561550661111).

Almost surely, 2^{23123101322221} is an apocalyptic number.

It is an amenable number.

23123101322221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23123101322221 is an equidigital number, since it uses as much as digits as its factorization.

23123101322221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 23123101322221 its reverse (12222310132132), we get a palindrome (35345411454353).

The spelling of 23123101322221 in words is "twenty-three trillion, one hundred twenty-three billion, one hundred one million, three hundred twenty-two thousand, two hundred twenty-one".