23220121311 has 16 divisors (see below), whose sum is σ = 34402636800. Its totient is φ = 15478975224.

The previous prime is 23220121307. The next prime is 23220121319. The reversal of 23220121311 is 11312102232.

23220121311 is a `hidden beast` number, since 232 + 2 + 0 + 121 + 311 = 666.

It is not a de Polignac number, because 23220121311 - 2² = 23220121307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23220121319) 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, 562930 + ... + 602768.

It is an arithmetic number, because the mean of its divisors is an integer number (2150164800).

Almost surely, 2^23220121311 is an apocalyptic number.

23220121311 is a deficient number, since it is larger than the sum of its proper divisors (11182515489).

23220121311 is a wasteful number, since it uses less digits than its factorization.

23220121311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61435 (or 61429 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 23220121311 its reverse (11312102232), we get a palindrome (34532223543).

The spelling of 23220121311 in words is "twenty-three billion, two hundred twenty million, one hundred twenty-one thousand, three hundred eleven".