23201111121 has 4 divisors (see below), whose sum is σ = 30934814832. Its totient is φ = 15467407412.

The previous prime is 23201111093. The next prime is 23201111159. The reversal of 23201111121 is 12111110232.

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 23201111121 - 2⁷ = 23201110993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23201111121.

It is not an unprimeable number, because it can be changed into a prime (23201111621) 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, 3866851851 + ... + 3866851856.

It is an arithmetic number, because the mean of its divisors is an integer number (7733703708).

Almost surely, 2^23201111121 is an apocalyptic number.

It is an amenable number.

23201111121 is a deficient number, since it is larger than the sum of its proper divisors (7733703711).

23201111121 is an equidigital number, since it uses as much as digits as its factorization.

23201111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7733703710.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 23201111121 its reverse (12111110232), we get a palindrome (35312221353).

It can be divided in two parts, 2320111 and 1121, that added together give a palindrome (2321232).

The spelling of 23201111121 in words is "twenty-three billion, two hundred one million, one hundred eleven thousand, one hundred twenty-one".