221212102099993 has 2 divisors, whose sum is σ = 221212102099994. Its totient is φ = 221212102099992.

The previous prime is 221212102099987. The next prime is 221212102100027. The reversal of 221212102099993 is 399990201212122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178321090030864 + 42891012069129 = 13353692^2 + 6549123^2 .

It is a cyclic number.

It is not a de Polignac number, because 221212102099993 - 2²⁵ = 221212068545561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221212102099993.

It is not a weakly prime, because it can be changed into another prime (221212102099943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606051049996 + 110606051049997.

It is an arithmetic number, because the mean of its divisors is an integer number (110606051049997).

Almost surely, 2^{221212102099993} is an apocalyptic number.

It is an amenable number.

221212102099993 is a deficient number, since it is larger than the sum of its proper divisors (1).

221212102099993 is an equidigital number, since it uses as much as digits as its factorization.

221212102099993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 52.

The spelling of 221212102099993 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred two million, ninety-nine thousand, nine hundred ninety-three".