121097907 has 24 divisors (see below), whose sum is σ = 200368896. Its totient is φ = 69039216.

The previous prime is 121097903. The next prime is 121097941. The reversal of 121097907 is 709790121.

It is not a de Polignac number, because 121097907 - 2² = 121097903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121097903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28708 + ... + 32654.

It is an arithmetic number, because the mean of its divisors is an integer number (8348704).

Almost surely, 2^121097907 is an apocalyptic number.

121097907 is a deficient number, since it is larger than the sum of its proper divisors (79270989).

121097907 is a wasteful number, since it uses less digits than its factorization.

121097907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4447 (or 4444 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 121097907 is about 11004.4494183035. The cubic root of 121097907 is about 494.7421123772.

The spelling of 121097907 in words is "one hundred twenty-one million, ninety-seven thousand, nine hundred seven".