121716492005 has 16 divisors (see below), whose sum is σ = 148837772160. Its totient is φ = 95521752768.

The previous prime is 121716491989. The next prime is 121716492011. The reversal of 121716492005 is 500294617121.

It is a cyclic number.

It is not a de Polignac number, because 121716492005 - 2⁴ = 121716491989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121716492005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1972754 + ... + 2033516.

It is an arithmetic number, because the mean of its divisors is an integer number (9302360760).

Almost surely, 2^121716492005 is an apocalyptic number.

It is an amenable number.

121716492005 is a deficient number, since it is larger than the sum of its proper divisors (27121280155).

121716492005 is an equidigital number, since it uses as much as digits as its factorization.

121716492005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68380.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 121716492005 in words is "one hundred twenty-one billion, seven hundred sixteen million, four hundred ninety-two thousand, five".