21221213002323 has 16 divisors (see below), whose sum is σ = 28765980454656. Its totient is φ = 13912076219040.

The previous prime is 21221213002261. The next prime is 21221213002337. The reversal of 21221213002323 is 32320031212212.

It is not a de Polignac number, because 21221213002323 - 2²¹ = 21221210905171 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21221213002293 and 21221213002302.

It is not an unprimeable number, because it can be changed into a prime (21221213002373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13736761 + ... + 15203322.

It is an arithmetic number, because the mean of its divisors is an integer number (1797873778416).

Almost surely, 2^{21221213002323} is an apocalyptic number.

21221213002323 is a deficient number, since it is larger than the sum of its proper divisors (7544767452333).

21221213002323 is a wasteful number, since it uses less digits than its factorization.

21221213002323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28944154.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21221213002323 its reverse (32320031212212), we get a palindrome (53541244214535).

The spelling of 21221213002323 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred thirteen million, two thousand, three hundred twenty-three".