10109211921 has 12 divisors (see below), whose sum is σ = 14624912848. Its totient is φ = 6728989464.

The previous prime is 10109211887. The next prime is 10109211929. The reversal of 10109211921 is 12911290101.

10109211921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10109211921 - 2⁷ = 10109211793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10109211929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 867655 + ... + 879228.

Almost surely, 2^10109211921 is an apocalyptic number.

It is an amenable number.

10109211921 is a deficient number, since it is larger than the sum of its proper divisors (4515700927).

10109211921 is a wasteful number, since it uses less digits than its factorization.

10109211921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747532 (or 1747529 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 27.

The spelling of 10109211921 in words is "ten billion, one hundred nine million, two hundred eleven thousand, nine hundred twenty-one".