21210002200993 has 2 divisors, whose sum is σ = 21210002200994. Its totient is φ = 21210002200992.

The previous prime is 21210002200963. The next prime is 21210002201027. The reversal of 21210002200993 is 39900220001212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20992964548864 + 217037652129 = 4581808^2 + 465873^2 .

It is a cyclic number.

It is not a de Polignac number, because 21210002200993 - 2¹³ = 21210002192801 is a prime.

It is a super-2 number, since 2×21210002200993² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21210002200903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605001100496 + 10605001100497.

It is an arithmetic number, because the mean of its divisors is an integer number (10605001100497).

Almost surely, 2^{21210002200993} is an apocalyptic number.

It is an amenable number.

21210002200993 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210002200993 is an equidigital number, since it uses as much as digits as its factorization.

21210002200993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 21210002200993 in words is "twenty-one trillion, two hundred ten billion, two million, two hundred thousand, nine hundred ninety-three".