21120002189 has 16 divisors (see below), whose sum is σ = 24900033984. Its totient is φ = 17660419200.

The previous prime is 21120002179. The next prime is 21120002191. The reversal of 21120002189 is 98120002112.

It is a cyclic number.

It is not a de Polignac number, because 21120002189 - 2¹⁶ = 21119936653 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 (21120002179) 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, 220472 + ... + 301409.

It is an arithmetic number, because the mean of its divisors is an integer number (1556252124).

Almost surely, 2^21120002189 is an apocalyptic number.

It is an amenable number.

21120002189 is a deficient number, since it is larger than the sum of its proper divisors (3780031795).

21120002189 is a wasteful number, since it uses less digits than its factorization.

21120002189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522188.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 21120002189 in words is "twenty-one billion, one hundred twenty million, two thousand, one hundred eighty-nine".