21120110244004 has 24 divisors (see below), whose sum is σ = 37194063536448. Its totient is φ = 10493277642720.

The previous prime is 21120110243971. The next prime is 21120110244007. The reversal of 21120110244004 is 40044201102112.

It is not an unprimeable number, because it can be changed into a prime (21120110244007) 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, 3356007 + ... + 7314574.

It is an arithmetic number, because the mean of its divisors is an integer number (1549752647352).

Almost surely, 2^{21120110244004} is an apocalyptic number.

It is an amenable number.

21120110244004 is a deficient number, since it is larger than the sum of its proper divisors (16073953292444).

21120110244004 is a wasteful number, since it uses less digits than its factorization.

21120110244004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10673715 (or 10673713 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21120110244004 its reverse (40044201102112), we get a palindrome (61164311346116).

The spelling of 21120110244004 in words is "twenty-one trillion, one hundred twenty billion, one hundred ten million, two hundred forty-four thousand, four".