22221399028 has 24 divisors (see below), whose sum is σ = 40217587200. Its totient is φ = 10736645088.

The previous prime is 22221399007. The next prime is 22221399029. The reversal of 22221399028 is 82099312222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221399029) 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, 733243 + ... + 762946.

It is an arithmetic number, because the mean of its divisors is an integer number (1675732800).

Almost surely, 2^22221399028 is an apocalyptic number.

It is an amenable number.

22221399028 is a deficient number, since it is larger than the sum of its proper divisors (17996188172).

22221399028 is a wasteful number, since it uses less digits than its factorization.

22221399028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496319 (or 1496317 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 22221399028 in words is "twenty-two billion, two hundred twenty-one million, three hundred ninety-nine thousand, twenty-eight".