21122360404 has 6 divisors (see below), whose sum is σ = 36964130714. Its totient is φ = 10561180200.

The previous prime is 21122360393. The next prime is 21122360423. The reversal of 21122360404 is 40406322112.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13803900100 + 7318460304 = 117490^2 + 85548^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2640295047 + ... + 2640295054.

Almost surely, 2^21122360404 is an apocalyptic number.

It is an amenable number.

21122360404 is a deficient number, since it is larger than the sum of its proper divisors (15841770310).

21122360404 is a wasteful number, since it uses less digits than its factorization.

21122360404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280590105 (or 5280590103 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21122360404 its reverse (40406322112), we get a palindrome (61528682516).

The spelling of 21122360404 in words is "twenty-one billion, one hundred twenty-two million, three hundred sixty thousand, four hundred four".