21021322213 has 8 divisors (see below), whose sum is σ = 22349167488. Its totient is φ = 19727966544.

The previous prime is 21021322207. The next prime is 21021322229. The reversal of 21021322213 is 31222312012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21021322213 - 2⁵ = 21021322181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021322513) 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 7 ways as a sum of consecutive naturals, for example, 8621145 + ... + 8623582.

It is an arithmetic number, because the mean of its divisors is an integer number (2793645936).

Almost surely, 2^21021322213 is an apocalyptic number.

21021322213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21021322213 is a deficient number, since it is larger than the sum of its proper divisors (1327845275).

21021322213 is a wasteful number, since it uses less digits than its factorization.

21021322213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17244803.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21021322213 its reverse (31222312012), we get a palindrome (52243634225).

The spelling of 21021322213 in words is "twenty-one billion, twenty-one million, three hundred twenty-two thousand, two hundred thirteen".