121791401 has 4 divisors (see below), whose sum is σ = 121862400. Its totient is φ = 121720404.

The previous prime is 121791379. The next prime is 121791407. The reversal of 121791401 is 104197121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121791401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121791407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32861 + ... + 36378.

It is an arithmetic number, because the mean of its divisors is an integer number (30465600).

Almost surely, 2^121791401 is an apocalyptic number.

It is an amenable number.

121791401 is a deficient number, since it is larger than the sum of its proper divisors (70999).

121791401 is an equidigital number, since it uses as much as digits as its factorization.

121791401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70998.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 121791401 is about 11035.9141442837. The cubic root of 121791401 is about 495.6847320679.

The spelling of 121791401 in words is "one hundred twenty-one million, seven hundred ninety-one thousand, four hundred one".