121265966 has 4 divisors (see below), whose sum is σ = 181898952. Its totient is φ = 60632982.

The previous prime is 121265951. The next prime is 121265993. The reversal of 121265966 is 669562121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 669562121 = 29 ⋅23088349.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30316490 + ... + 30316493.

It is an arithmetic number, because the mean of its divisors is an integer number (45474738).

Almost surely, 2^121265966 is an apocalyptic number.

121265966 is a deficient number, since it is larger than the sum of its proper divisors (60632986).

121265966 is an equidigital number, since it uses as much as digits as its factorization.

121265966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60632985.

The product of its digits is 38880, while the sum is 38.

The square root of 121265966 is about 11012.0827276224. The cubic root of 121265966 is about 494.9708733669.

The spelling of 121265966 in words is "one hundred twenty-one million, two hundred sixty-five thousand, nine hundred sixty-six".