23231002112221 has 4 divisors (see below), whose sum is σ = 24597531648252. Its totient is φ = 21864472576192.

The previous prime is 23231002112191. The next prime is 23231002112233. The reversal of 23231002112221 is 12221120013232.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20462142720100 + 2768859392121 = 4523510^2 + 1663989^2 .

It is a cyclic number.

It is not a de Polignac number, because 23231002112221 - 2¹⁷ = 23231001981149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23231002112192 and 23231002112201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23231002112251) 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, 683264767990 + ... + 683264768023.

It is an arithmetic number, because the mean of its divisors is an integer number (6149382912063).

Almost surely, 2^{23231002112221} is an apocalyptic number.

It is an amenable number.

23231002112221 is a deficient number, since it is larger than the sum of its proper divisors (1366529536031).

23231002112221 is a wasteful number, since it uses less digits than its factorization.

23231002112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366529536030.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 23231002112221 its reverse (12221120013232), we get a palindrome (35452122125453).

The spelling of 23231002112221 in words is "twenty-three trillion, two hundred thirty-one billion, two million, one hundred twelve thousand, two hundred twenty-one".