21142104224104 has 32 divisors (see below), whose sum is σ = 39822659549640. Its totient is φ = 10522765209600.

The previous prime is 21142104224053. The next prime is 21142104224113. The reversal of 21142104224104 is 40142240124112.

21142104224104 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8811457928100 + 12330646296004 = 2968410^2 + 3511502^2 .

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, 2287792 + ... + 6893344.

Almost surely, 2^{21142104224104} is an apocalyptic number.

It is an amenable number.

21142104224104 is a deficient number, since it is larger than the sum of its proper divisors (18680555325536).

21142104224104 is a wasteful number, since it uses less digits than its factorization.

21142104224104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608181 (or 4608177 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

Adding to 21142104224104 its reverse (40142240124112), we get a palindrome (61284344348216).

The spelling of 21142104224104 in words is "twenty-one trillion, one hundred forty-two billion, one hundred four million, two hundred twenty-four thousand, one hundred four".