10168697921 has 4 divisors (see below), whose sum is σ = 10405179312. Its totient is φ = 9932216532.

The previous prime is 10168697911. The next prime is 10168697933. The reversal of 10168697921 is 12979686101.

10168697921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12979686101 = 109 ⋅119079689.

It is a cyclic number.

It is not a de Polignac number, because 10168697921 - 2³⁰ = 9094956097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10168697921.

It is not an unprimeable number, because it can be changed into a prime (10168697911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118240631 + ... + 118240716.

It is an arithmetic number, because the mean of its divisors is an integer number (2601294828).

Almost surely, 2^10168697921 is an apocalyptic number.

It is an amenable number.

10168697921 is a deficient number, since it is larger than the sum of its proper divisors (236481391).

10168697921 is an equidigital number, since it uses as much as digits as its factorization.

10168697921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236481390.

The product of its (nonzero) digits is 326592, while the sum is 50.

The spelling of 10168697921 in words is "ten billion, one hundred sixty-eight million, six hundred ninety-seven thousand, nine hundred twenty-one".