21223100113021 has 2 divisors, whose sum is σ = 21223100113022. Its totient is φ = 21223100113020.

The previous prime is 21223100112971. The next prime is 21223100113031. The reversal of 21223100113021 is 12031100132212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18527954056921 + 2695146056100 = 4304411^2 + 1641690^2 .

It is a cyclic number.

It is not a de Polignac number, because 21223100113021 - 2¹¹ = 21223100110973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21223100113021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21223100113031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611550056510 + 10611550056511.

It is an arithmetic number, because the mean of its divisors is an integer number (10611550056511).

Almost surely, 2^{21223100113021} is an apocalyptic number.

It is an amenable number.

21223100113021 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223100113021 is an equidigital number, since it uses as much as digits as its factorization.

21223100113021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21223100113021 its reverse (12031100132212), we get a palindrome (33254200245233).

The spelling of 21223100113021 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred million, one hundred thirteen thousand, twenty-one".