21120002192 has 40 divisors (see below), whose sum is σ = 41321998080. Its totient is φ = 10456387200.

The previous prime is 21120002191. The next prime is 21120002213. The reversal of 21120002192 is 29120002112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21120002191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3734567 + ... + 3740217.

It is an arithmetic number, because the mean of its divisors is an integer number (1033049952).

Almost surely, 2^21120002192 is an apocalyptic number.

It is an amenable number.

21120002192 is a deficient number, since it is larger than the sum of its proper divisors (20201995888).

21120002192 is a wasteful number, since it uses less digits than its factorization.

21120002192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7911 (or 7905 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 21120002192 in words is "twenty-one billion, one hundred twenty million, two thousand, one hundred ninety-two".