21223100032213 has 2 divisors, whose sum is σ = 21223100032214. Its totient is φ = 21223100032212.

The previous prime is 21223100032163. The next prime is 21223100032217. The reversal of 21223100032213 is 31223000132212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20327771528689 + 895328503524 = 4508633^2 + 946218^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21223100032213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21223100032217) 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 as a sum of consecutive naturals, namely, 10611550016106 + 10611550016107.

It is an arithmetic number, because the mean of its divisors is an integer number (10611550016107).

Almost surely, 2^{21223100032213} is an apocalyptic number.

It is an amenable number.

21223100032213 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223100032213 is an equidigital number, since it uses as much as digits as its factorization.

21223100032213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21223100032213 its reverse (31223000132212), we get a palindrome (52446100164425).

Subtracting 21223100032213 from its reverse (31223000132212), we obtain a palindrome (9999900099999).

The spelling of 21223100032213 in words is "twenty-one trillion, two hundred twenty-three billion, one hundred million, thirty-two thousand, two hundred thirteen".