400000021222304 has 24 divisors (see below), whose sum is σ = 788102566761888. Its totient is φ = 199846988393920.

The previous prime is 400000021222253. The next prime is 400000021222357. The reversal of 400000021222304 is 403222120000004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4781901812 + ... + 4781985459.

It is an arithmetic number, because the mean of its divisors is an integer number (32837606948412).

Almost surely, 2^{400000021222304} is an apocalyptic number.

It is an amenable number.

400000021222304 is a deficient number, since it is larger than the sum of its proper divisors (388102545539584).

400000021222304 is a wasteful number, since it uses less digits than its factorization.

400000021222304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9563888588 (or 9563888580 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 400000021222304 its reverse (403222120000004), we get a palindrome (803222141222308).

The spelling of 400000021222304 in words is "four hundred trillion, twenty-one million, two hundred twenty-two thousand, three hundred four".