23111320011 has 16 divisors (see below), whose sum is σ = 33891561984. Its totient is φ = 13919746464.

The previous prime is 23111320003. The next prime is 23111320013. The reversal of 23111320011 is 11002311132.

It is a happy number.

It is not a de Polignac number, because 23111320011 - 2³ = 23111320003 is a prime.

It is a super-2 number, since 2×23111320011² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23111320013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6302401 + ... + 6306066.

It is an arithmetic number, because the mean of its divisors is an integer number (2118222624).

Almost surely, 2^23111320011 is an apocalyptic number.

23111320011 is a deficient number, since it is larger than the sum of its proper divisors (10780241973).

23111320011 is a wasteful number, since it uses less digits than its factorization.

23111320011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12608530.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 23111320011 its reverse (11002311132), we get a palindrome (34113631143).

The spelling of 23111320011 in words is "twenty-three billion, one hundred eleven million, three hundred twenty thousand, eleven".