221000212120999 has 2 divisors, whose sum is σ = 221000212121000. Its totient is φ = 221000212120998.

The previous prime is 221000212120967. The next prime is 221000212121057. The reversal of 221000212120999 is 999021212000122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221000212120999 - 2⁵ = 221000212120967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221000212124999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500106060499 + 110500106060500.

It is an arithmetic number, because the mean of its divisors is an integer number (110500106060500).

Almost surely, 2^{221000212120999} is an apocalyptic number.

221000212120999 is a deficient number, since it is larger than the sum of its proper divisors (1).

221000212120999 is an equidigital number, since it uses as much as digits as its factorization.

221000212120999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 221000212120999 in words is "two hundred twenty-one trillion, two hundred twelve million, one hundred twenty thousand, nine hundred ninety-nine".