23201122211 has 4 divisors (see below), whose sum is σ = 23203475424. Its totient is φ = 23198769000.

The previous prime is 23201122201. The next prime is 23201122223. The reversal of 23201122211 is 11222110232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23201122211 - 2¹⁰ = 23201121187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23201122211.

It is not an unprimeable number, because it can be changed into a prime (23201122201) 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, 1161755 + ... + 1181556.

It is an arithmetic number, because the mean of its divisors is an integer number (5800868856).

Almost surely, 2^23201122211 is an apocalyptic number.

23201122211 is a deficient number, since it is larger than the sum of its proper divisors (2353213).

23201122211 is an equidigital number, since it uses as much as digits as its factorization.

23201122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353212.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 23201122211 its reverse (11222110232), we get a palindrome (34423232443).

The spelling of 23201122211 in words is "twenty-three billion, two hundred one million, one hundred twenty-two thousand, two hundred eleven".