22121404 has 6 divisors (see below), whose sum is σ = 38712464. Its totient is φ = 11060700.

The previous prime is 22121387. The next prime is 22121431. The reversal of 22121404 is 40412122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2765172 + ... + 2765179.

Almost surely, 2^22121404 is an apocalyptic number.

It is an amenable number.

22121404 is a deficient number, since it is larger than the sum of its proper divisors (16591060).

22121404 is a wasteful number, since it uses less digits than its factorization.

22121404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5530355 (or 5530353 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 22121404 is about 4703.3396645363. The cubic root of 22121404 is about 280.7184102638.

Adding to 22121404 its reverse (40412122), we get a palindrome (62533526).

The spelling of 22121404 in words is "twenty-two million, one hundred twenty-one thousand, four hundred four".