221111213120999 has 2 divisors, whose sum is σ = 221111213121000. Its totient is φ = 221111213120998.

The previous prime is 221111213120983. The next prime is 221111213121017. The reversal of 221111213120999 is 999021312111122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221111213120999 - 2⁴ = 221111213120983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221111213120099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555606560499 + 110555606560500.

It is an arithmetic number, because the mean of its divisors is an integer number (110555606560500).

Almost surely, 2^{221111213120999} is an apocalyptic number.

221111213120999 is a deficient number, since it is larger than the sum of its proper divisors (1).

221111213120999 is an equidigital number, since it uses as much as digits as its factorization.

221111213120999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 44.

The spelling of 221111213120999 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred thirteen million, one hundred twenty thousand, nine hundred ninety-nine".