23103211221 has 24 divisors (see below), whose sum is σ = 33708966720. Its totient is φ = 15246878400.

The previous prime is 23103211207. The next prime is 23103211279. The reversal of 23103211221 is 12211230132.

23103211221 is a `hidden beast` number, since 2 + 310 + 321 + 12 + 21 = 666.

It is not a de Polignac number, because 23103211221 - 2⁹ = 23103210709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23103211194 and 23103211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23103211721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 458256 + ... + 506166.

It is an arithmetic number, because the mean of its divisors is an integer number (1404540280).

Almost surely, 2^23103211221 is an apocalyptic number.

It is an amenable number.

23103211221 is a deficient number, since it is larger than the sum of its proper divisors (10605755499).

23103211221 is a wasteful number, since it uses less digits than its factorization.

23103211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48457 (or 48454 counting only the distinct ones).

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

Adding to 23103211221 its reverse (12211230132), we get a palindrome (35314441353).

The spelling of 23103211221 in words is "twenty-three billion, one hundred three million, two hundred eleven thousand, two hundred twenty-one".