21002224213 has 2 divisors, whose sum is σ = 21002224214. Its totient is φ = 21002224212.

The previous prime is 21002224169. The next prime is 21002224219. The reversal of 21002224213 is 31242220012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13922348049 + 7079876164 = 117993^2 + 84142^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002224213 - 2³³ = 12412289621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002224219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501112106 + 10501112107.

It is an arithmetic number, because the mean of its divisors is an integer number (10501112107).

Almost surely, 2^21002224213 is an apocalyptic number.

It is an amenable number.

21002224213 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002224213 is an equidigital number, since it uses as much as digits as its factorization.

21002224213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21002224213 its reverse (31242220012), we get a palindrome (52244444225).

The spelling of 21002224213 in words is "twenty-one billion, two million, two hundred twenty-four thousand, two hundred thirteen".