23011123321 has 4 divisors (see below), whose sum is σ = 23012752500. Its totient is φ = 23009494144.

The previous prime is 23011123309. The next prime is 23011123337. The reversal of 23011123321 is 12332111032.

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 13128576400 + 9882546921 = 114580^2 + 99411^2 .

It is a cyclic number.

It is not a de Polignac number, because 23011123321 - 2⁹ = 23011122809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23011123621) 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, 793216 + ... + 821713.

It is an arithmetic number, because the mean of its divisors is an integer number (5753188125).

Almost surely, 2^23011123321 is an apocalyptic number.

It is an amenable number.

23011123321 is a deficient number, since it is larger than the sum of its proper divisors (1629179).

23011123321 is a wasteful number, since it uses less digits than its factorization.

23011123321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629178.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 23011123321 its reverse (12332111032), we get a palindrome (35343234353).

The spelling of 23011123321 in words is "twenty-three billion, eleven million, one hundred twenty-three thousand, three hundred twenty-one".