121388005 has 8 divisors (see below), whose sum is σ = 146714400. Its totient is φ = 96411216.

The previous prime is 121387907. The next prime is 121388021. The reversal of 121388005 is 500883121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121388005 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 86635 + ... + 88024.

It is an arithmetic number, because the mean of its divisors is an integer number (18339300).

Almost surely, 2^121388005 is an apocalyptic number.

It is an amenable number.

121388005 is a deficient number, since it is larger than the sum of its proper divisors (25326395).

121388005 is a wasteful number, since it uses less digits than its factorization.

121388005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174803.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 121388005 is about 11017.6224749262. The cubic root of 121388005 is about 495.1368597524.

The spelling of 121388005 in words is "one hundred twenty-one million, three hundred eighty-eight thousand, five".