121031775166 has 4 divisors (see below), whose sum is σ = 181547662752. Its totient is φ = 60515887582.

The previous prime is 121031775149. The next prime is 121031775169. The reversal of 121031775166 is 661577130121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 661577130121 = 15971 ⋅41423651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121031775169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30257943790 + ... + 30257943793.

It is an arithmetic number, because the mean of its divisors is an integer number (45386915688).

Almost surely, 2^121031775166 is an apocalyptic number.

121031775166 is a deficient number, since it is larger than the sum of its proper divisors (60515887586).

121031775166 is an equidigital number, since it uses as much as digits as its factorization.

121031775166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60515887585.

The product of its (nonzero) digits is 52920, while the sum is 40.

The spelling of 121031775166 in words is "one hundred twenty-one billion, thirty-one million, seven hundred seventy-five thousand, one hundred sixty-six".