21021112118 has 8 divisors (see below), whose sum is σ = 33191229720. Its totient is φ = 9957368880.

The previous prime is 21021112111. The next prime is 21021112163. The reversal of 21021112118 is 81121112012.

It is a happy number.

21021112118 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21021112118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021112111) 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, 276593543 + ... + 276593618.

It is an arithmetic number, because the mean of its divisors is an integer number (4148903715).

Almost surely, 2^21021112118 is an apocalyptic number.

21021112118 is a deficient number, since it is larger than the sum of its proper divisors (12170117602).

21021112118 is a wasteful number, since it uses less digits than its factorization.

21021112118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553187182.

The product of its (nonzero) digits is 64, while the sum is 20.

The spelling of 21021112118 in words is "twenty-one billion, twenty-one million, one hundred twelve thousand, one hundred eighteen".