121200211099 has 8 divisors (see below), whose sum is σ = 136483522560. Its totient is φ = 106627751400.

The previous prime is 121200211049. The next prime is 121200211109. The reversal of 121200211099 is 990112002121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121200211099 - 2³⁵ = 86840472731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121200211049) 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 7 ways as a sum of consecutive naturals, for example, 177712579 + ... + 177713260.

It is an arithmetic number, because the mean of its divisors is an integer number (17060440320).

Almost surely, 2^121200211099 is an apocalyptic number.

121200211099 is a deficient number, since it is larger than the sum of its proper divisors (15283311461).

121200211099 is a wasteful number, since it uses less digits than its factorization.

121200211099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355425881.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 121200211099 in words is "one hundred twenty-one billion, two hundred million, two hundred eleven thousand, ninety-nine".