23111220001 has 4 divisors (see below), whose sum is σ = 23111632432. Its totient is φ = 23110807572.

The previous prime is 23111219983. The next prime is 23111220043. The reversal of 23111220001 is 10002211132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23111220001 - 2¹⁵ = 23111187233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23111220901) 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, 105891 + ... + 239656.

It is an arithmetic number, because the mean of its divisors is an integer number (5777908108).

Almost surely, 2^23111220001 is an apocalyptic number.

It is an amenable number.

23111220001 is a deficient number, since it is larger than the sum of its proper divisors (412431).

23111220001 is an equidigital number, since it uses as much as digits as its factorization.

23111220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412430.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 23111220001 its reverse (10002211132), we get a palindrome (33113431133).

The spelling of 23111220001 in words is "twenty-three billion, one hundred eleven million, two hundred twenty thousand, one".