74121500921 has 8 divisors (see below), whose sum is σ = 79825839744. Its totient is φ = 68417545680.

The previous prime is 74121500911. The next prime is 74121500923. The reversal of 74121500921 is 12900512147.

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

It is a cyclic number.

It is not a de Polignac number, because 74121500921 - 2¹⁴ = 74121484537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74121500923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400736 + ... + 555726.

It is an arithmetic number, because the mean of its divisors is an integer number (9978229968).

Almost surely, 2^74121500921 is an apocalyptic number.

It is an amenable number.

74121500921 is a deficient number, since it is larger than the sum of its proper divisors (5704338823).

74121500921 is a wasteful number, since it uses less digits than its factorization.

74121500921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191791.

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 74121500921 in words is "seventy-four billion, one hundred twenty-one million, five hundred thousand, nine hundred twenty-one".