121309768 has 8 divisors (see below), whose sum is σ = 227455830. Its totient is φ = 60654880.

The previous prime is 121309733. The next prime is 121309777. The reversal of 121309768 is 867903121.

It can be written as a sum of positive squares in only one way, i.e., 85045284 + 36264484 = 9222^2 + 6022^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7581853 + ... + 7581868.

Almost surely, 2^121309768 is an apocalyptic number.

It is an amenable number.

121309768 is a deficient number, since it is larger than the sum of its proper divisors (106146062).

121309768 is a wasteful number, since it uses less digits than its factorization.

121309768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15163727 (or 15163723 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 121309768 is about 11014.0713634877. The cubic root of 121309768 is about 495.0304616835.

The spelling of 121309768 in words is "one hundred twenty-one million, three hundred nine thousand, seven hundred sixty-eight".