121902090299 has 4 divisors (see below), whose sum is σ = 132984098520. Its totient is φ = 110820082080.

The previous prime is 121902090287. The next prime is 121902090301. The reversal of 121902090299 is 992090209121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 992090209121 = 11 ⋅90190019011.

It is a cyclic number.

It is not a de Polignac number, because 121902090299 - 2¹² = 121902086203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121902090259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5541004094 + ... + 5541004115.

It is an arithmetic number, because the mean of its divisors is an integer number (33246024630).

Almost surely, 2^121902090299 is an apocalyptic number.

121902090299 is a deficient number, since it is larger than the sum of its proper divisors (11082008221).

121902090299 is a wasteful number, since it uses less digits than its factorization.

121902090299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11082008220.

The product of its (nonzero) digits is 52488, while the sum is 44.

The spelling of 121902090299 in words is "one hundred twenty-one billion, nine hundred two million, ninety thousand, two hundred ninety-nine".