108972749921 has 8 divisors (see below), whose sum is σ = 124549860864. Its totient is φ = 93398032800.

The previous prime is 108972749839. The next prime is 108972749939. The reversal of 108972749921 is 129947279801.

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 108972749921 - 2²² = 108968555617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108972349921) by changing a digit.

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, 499820 + ... + 683933.

It is an arithmetic number, because the mean of its divisors is an integer number (15568732608).

Almost surely, 2^108972749921 is an apocalyptic number.

It is an amenable number.

108972749921 is a deficient number, since it is larger than the sum of its proper divisors (15577110943).

108972749921 is a wasteful number, since it uses less digits than its factorization.

108972749921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196911.

The product of its (nonzero) digits is 4572288, while the sum is 59.

The spelling of 108972749921 in words is "one hundred eight billion, nine hundred seventy-two million, seven hundred forty-nine thousand, nine hundred twenty-one".