22121210399 has 16 divisors (see below), whose sum is σ = 22502188800. Its totient is φ = 21743916096.

The previous prime is 22121210383. The next prime is 22121210429. The reversal of 22121210399 is 99301212122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22121210399 - 2⁴ = 22121210383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121210329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17569832 + ... + 17571090.

It is an arithmetic number, because the mean of its divisors is an integer number (1406386800).

Almost surely, 2^22121210399 is an apocalyptic number.

22121210399 is a deficient number, since it is larger than the sum of its proper divisors (380978401).

22121210399 is a wasteful number, since it uses less digits than its factorization.

22121210399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494.

The product of its (nonzero) digits is 3888, while the sum is 32.

The spelling of 22121210399 in words is "twenty-two billion, one hundred twenty-one million, two hundred ten thousand, three hundred ninety-nine".