121200220999 has 18 divisors (see below), whose sum is σ = 144256084728. Its totient is φ = 101706462000.

The previous prime is 121200220993. The next prime is 121200221011. The reversal of 121200220999 is 999022002121.

It is not a de Polignac number, because 121200220999 - 2⁷ = 121200220871 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 (121200220993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2943027 + ... + 2983924.

Almost surely, 2^121200220999 is an apocalyptic number.

121200220999 is a deficient number, since it is larger than the sum of its proper divisors (23055863729).

121200220999 is a wasteful number, since it uses less digits than its factorization.

121200220999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5926999 (or 5926975 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 37.

The spelling of 121200220999 in words is "one hundred twenty-one billion, two hundred million, two hundred twenty thousand, nine hundred ninety-nine".