21210332220013 has 2 divisors, whose sum is σ = 21210332220014. Its totient is φ = 21210332220012.

The previous prime is 21210332219983. The next prime is 21210332220019. The reversal of 21210332220013 is 31002223301212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21159383604489 + 50948615524 = 4599933^2 + 225718^2 .

It is a cyclic number.

It is not a de Polignac number, because 21210332220013 - 2⁵ = 21210332219981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21210332220019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605166110006 + 10605166110007.

It is an arithmetic number, because the mean of its divisors is an integer number (10605166110007).

Almost surely, 2^{21210332220013} is an apocalyptic number.

It is an amenable number.

21210332220013 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210332220013 is an equidigital number, since it uses as much as digits as its factorization.

21210332220013 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 21210332220013 its reverse (31002223301212), we get a palindrome (52212555521225).

The spelling of 21210332220013 in words is "twenty-one trillion, two hundred ten billion, three hundred thirty-two million, two hundred twenty thousand, thirteen".