1000222221998 has 32 divisors (see below), whose sum is σ = 1672459345440. Its totient is φ = 445849850880.

The previous prime is 1000222221997. The next prime is 1000222222019. The reversal of 1000222221998 is 8991222220001.

It is a super-2 number, since 2×1000222221998² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000222221997) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4133690 + ... + 4368962.

It is an arithmetic number, because the mean of its divisors is an integer number (52264354545).

Almost surely, 2^{1000222221998} is an apocalyptic number.

1000222221998 is a deficient number, since it is larger than the sum of its proper divisors (672237123442).

1000222221998 is a wasteful number, since it uses less digits than its factorization.

1000222221998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241892.

The product of its (nonzero) digits is 20736, while the sum is 38.

Adding to 1000222221998 its reverse (8991222220001), we get a palindrome (9991444441999).

The spelling of 1000222221998 in words is "one trillion, two hundred twenty-two million, two hundred twenty-one thousand, nine hundred ninety-eight".