21100224040404 has 24 divisors (see below), whose sum is σ = 49439855498880. Its totient is φ = 7003979527104.

The previous prime is 21100224040403. The next prime is 21100224040409. The reversal of 21100224040404 is 40404042200112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100224040403) 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, 3678557809 + ... + 3678563544.

It is an arithmetic number, because the mean of its divisors is an integer number (2059993979120).

Almost surely, 2^{21100224040404} is an apocalyptic number.

It is an amenable number.

21100224040404 is an abundant number, since it is smaller than the sum of its proper divisors (28339631458476).

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

21100224040404 is a wasteful number, since it uses less digits than its factorization.

21100224040404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7357121599 (or 7357121597 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 21100224040404 its reverse (40404042200112), we get a palindrome (61504266240516).

The spelling of 21100224040404 in words is "twenty-one trillion, one hundred billion, two hundred twenty-four million, forty thousand, four hundred four".