21120224104 has 32 divisors (see below), whose sum is σ = 45680604480. Its totient is φ = 8966928384.

The previous prime is 21120224077. The next prime is 21120224113. The reversal of 21120224104 is 40142202112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1756377 + ... + 1768360.

It is an arithmetic number, because the mean of its divisors is an integer number (1427518890).

Almost surely, 2^21120224104 is an apocalyptic number.

It is an amenable number.

21120224104 is an abundant number, since it is smaller than the sum of its proper divisors (24560380376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21120224104 is a wasteful number, since it uses less digits than its factorization.

21120224104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524857 (or 3524853 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21120224104 its reverse (40142202112), we get a palindrome (61262426216).

The spelling of 21120224104 in words is "twenty-one billion, one hundred twenty million, two hundred twenty-four thousand, one hundred four".