21023100322221 has 16 divisors (see below), whose sum is σ = 28069680038400. Its totient is φ = 13995966925488.

The previous prime is 21023100322207. The next prime is 21023100322271. The reversal of 21023100322221 is 12222300132012.

It is not a de Polignac number, because 21023100322221 - 2²⁷ = 21022966104493 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023100322271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12143610 + ... + 13766388.

It is an arithmetic number, because the mean of its divisors is an integer number (1754355002400).

Almost surely, 2^{21023100322221} is an apocalyptic number.

It is an amenable number.

21023100322221 is a deficient number, since it is larger than the sum of its proper divisors (7046579716179).

21023100322221 is a wasteful number, since it uses less digits than its factorization.

21023100322221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628768.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21023100322221 its reverse (12222300132012), we get a palindrome (33245400454233).

The spelling of 21023100322221 in words is "twenty-one trillion, twenty-three billion, one hundred million, three hundred twenty-two thousand, two hundred twenty-one".