99217921674901 has 16 divisors (see below), whose sum is σ = 104395722198768. Its totient is φ = 94191628377600.

The previous prime is 99217921674877. The next prime is 99217921674919. The reversal of 99217921674901 is 10947612971299.

It can be written as a sum of positive squares in 8 ways, for example, as 870516990225 + 98347404684676 = 933015^2 + 9917026^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99217921674901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99217921674941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139411840 + ... + 140121721.

It is an arithmetic number, because the mean of its divisors is an integer number (6524732637423).

Almost surely, 2^{99217921674901} is an apocalyptic number.

It is an amenable number.

99217921674901 is a deficient number, since it is larger than the sum of its proper divisors (5177800523867).

99217921674901 is a wasteful number, since it uses less digits than its factorization.

99217921674901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279533832.

The product of its (nonzero) digits is 30862944, while the sum is 67.

The spelling of 99217921674901 in words is "ninety-nine trillion, two hundred seventeen billion, nine hundred twenty-one million, six hundred seventy-four thousand, nine hundred one".