199612017342921 has 8 divisors (see below), whose sum is σ = 281805200954784. Its totient is φ = 125246755979840.

The previous prime is 199612017342917. The next prime is 199612017342949. The reversal of 199612017342921 is 129243710216991.

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 199612017342921 - 2² = 199612017342917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199612017342121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1956980562135 + ... + 1956980562236.

It is an arithmetic number, because the mean of its divisors is an integer number (35225650119348).

Almost surely, 2^{199612017342921} is an apocalyptic number.

It is an amenable number.

199612017342921 is a deficient number, since it is larger than the sum of its proper divisors (82193183611863).

199612017342921 is a wasteful number, since it uses less digits than its factorization.

199612017342921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3913961124391.

The product of its (nonzero) digits is 2939328, while the sum is 57.

The spelling of 199612017342921 in words is "one hundred ninety-nine trillion, six hundred twelve billion, seventeen million, three hundred forty-two thousand, nine hundred twenty-one".