121808007 has 12 divisors (see below), whose sum is σ = 180236784. Its totient is φ = 79224480.

The previous prime is 121807997. The next prime is 121808047. The reversal of 121808007 is 700808121.

It is not a de Polignac number, because 121808007 - 2¹⁸ = 121545863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121808047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164683 + ... + 165420.

It is an arithmetic number, because the mean of its divisors is an integer number (15019732).

Almost surely, 2^121808007 is an apocalyptic number.

121808007 is a deficient number, since it is larger than the sum of its proper divisors (58428777).

121808007 is a wasteful number, since it uses less digits than its factorization.

121808007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330150 (or 330147 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 121808007 is about 11036.6664804188. Note that the first 3 decimals coincide. The cubic root of 121808007 is about 495.7072595658.

The spelling of 121808007 in words is "one hundred twenty-one million, eight hundred eight thousand, seven".