21100304422 has 16 divisors (see below), whose sum is σ = 34091069760. Its totient is φ = 9762441192.

The previous prime is 21100304371. The next prime is 21100304437. The reversal of 21100304422 is 22440300112.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 21100304422.

It is a congruent number.

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, 6455008 + ... + 6458275.

It is an arithmetic number, because the mean of its divisors is an integer number (2130691860).

Almost surely, 2^21100304422 is an apocalyptic number.

21100304422 is a deficient number, since it is larger than the sum of its proper divisors (12990765338).

21100304422 is a wasteful number, since it uses less digits than its factorization.

21100304422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12913347.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21100304422 its reverse (22440300112), we get a palindrome (43540604534).

The spelling of 21100304422 in words is "twenty-one billion, one hundred million, three hundred four thousand, four hundred twenty-two".