21102221232113 has 4 divisors (see below), whose sum is σ = 24116824265280. Its totient is φ = 18087618198948.

The previous prime is 21102221232101. The next prime is 21102221232133. The reversal of 21102221232113 is 31123212220112.

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 21102221232113 - 2²⁴ = 21102204454897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102221232133) 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, 1507301516573 + ... + 1507301516586.

It is an arithmetic number, because the mean of its divisors is an integer number (6029206066320).

Almost surely, 2^{21102221232113} is an apocalyptic number.

It is an amenable number.

21102221232113 is a deficient number, since it is larger than the sum of its proper divisors (3014603033167).

21102221232113 is an equidigital number, since it uses as much as digits as its factorization.

21102221232113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3014603033166.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21102221232113 its reverse (31123212220112), we get a palindrome (52225433452225).

The spelling of 21102221232113 in words is "twenty-one trillion, one hundred two billion, two hundred twenty-one million, two hundred thirty-two thousand, one hundred thirteen".