121100209979 has 8 divisors (see below), whose sum is σ = 141618850560. Its totient is φ = 101386222056.

The previous prime is 121100209973. The next prime is 121100209999. The reversal of 121100209979 is 979902001121.

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

It is not a de Polignac number, because 121100209979 - 2¹² = 121100205883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121100209973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201162839 + ... + 201163440.

It is an arithmetic number, because the mean of its divisors is an integer number (17702356320).

Almost surely, 2^121100209979 is an apocalyptic number.

121100209979 is a deficient number, since it is larger than the sum of its proper divisors (20518640581).

121100209979 is an equidigital number, since it uses as much as digits as its factorization.

121100209979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402326329.

The product of its (nonzero) digits is 20412, while the sum is 41.

The spelling of 121100209979 in words is "one hundred twenty-one billion, one hundred million, two hundred nine thousand, nine hundred seventy-nine".