120221111221999 has 6 divisors (see below), whose sum is σ = 126881560597560. Its totient is φ = 113893684315236.

The previous prime is 120221111221949. The next prime is 120221111222021. The reversal of 120221111221999 is 999122111122021.

It is not a de Polignac number, because 120221111221999 - 2²⁵ = 120221077667567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120221111221949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166511234019 + ... + 166511234740.

It is an arithmetic number, because the mean of its divisors is an integer number (21146926766260).

Almost surely, 2^{120221111221999} is an apocalyptic number.

120221111221999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

120221111221999 is a deficient number, since it is larger than the sum of its proper divisors (6660449375561).

120221111221999 is an equidigital number, since it uses as much as digits as its factorization.

120221111221999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333022468797 (or 333022468778 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 43.

The spelling of 120221111221999 in words is "one hundred twenty trillion, two hundred twenty-one billion, one hundred eleven million, two hundred twenty-one thousand, nine hundred ninety-nine".