23111111042321 has 2 divisors, whose sum is σ = 23111111042322. Its totient is φ = 23111111042320.

The previous prime is 23111111042287. The next prime is 23111111042413. The reversal of 23111111042321 is 12324011111132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22599907492096 + 511203550225 = 4753936^2 + 714985^2 .

It is a cyclic number.

It is not a de Polignac number, because 23111111042321 - 2²² = 23111106848017 is a prime.

It is a super-3 number, since 3×23111111042321³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (23111111042221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11555555521160 + 11555555521161.

It is an arithmetic number, because the mean of its divisors is an integer number (11555555521161).

Almost surely, 2^{23111111042321} is an apocalyptic number.

It is an amenable number.

23111111042321 is a deficient number, since it is larger than the sum of its proper divisors (1).

23111111042321 is an equidigital number, since it uses as much as digits as its factorization.

23111111042321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 23111111042321 its reverse (12324011111132), we get a palindrome (35435122153453).

The spelling of 23111111042321 in words is "twenty-three trillion, one hundred eleven billion, one hundred eleven million, forty-two thousand, three hundred twenty-one".