121102200091 has 4 divisors (see below), whose sum is σ = 121299757312. Its totient is φ = 120904642872.

The previous prime is 121102200071. The next prime is 121102200097. The reversal of 121102200091 is 190002201121.

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: 190002201121 = 35461 ⋅5358061.

It is a cyclic number.

It is not a de Polignac number, because 121102200091 - 2³³ = 112512265499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121102200097) 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 3 ways as a sum of consecutive naturals, for example, 98777691 + ... + 98778916.

It is an arithmetic number, because the mean of its divisors is an integer number (30324939328).

Almost surely, 2^121102200091 is an apocalyptic number.

121102200091 is a deficient number, since it is larger than the sum of its proper divisors (197557221).

121102200091 is an equidigital number, since it uses as much as digits as its factorization.

121102200091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197557220.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 121102200091 in words is "one hundred twenty-one billion, one hundred two million, two hundred thousand, ninety-one".