121072407 has 4 divisors (see below), whose sum is σ = 161429880. Its totient is φ = 80714936.

The previous prime is 121072403. The next prime is 121072411. The reversal of 121072407 is 704270121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (121072403) and next prime (121072411).

It is a cyclic number.

It is not a de Polignac number, because 121072407 - 2² = 121072403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121072403) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 20178732 + ... + 20178737.

It is an arithmetic number, because the mean of its divisors is an integer number (40357470).

Almost surely, 2^121072407 is an apocalyptic number.

121072407 is a deficient number, since it is larger than the sum of its proper divisors (40357473).

121072407 is an equidigital number, since it uses as much as digits as its factorization.

121072407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40357472.

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 121072407 is about 11003.2907350483. The cubic root of 121072407 is about 494.7073834272.

The spelling of 121072407 in words is "one hundred twenty-one million, seventy-two thousand, four hundred seven".