1000000222021 has 4 divisors (see below), whose sum is σ = 1000020621600. Its totient is φ = 999979822444.

The previous prime is 1000000222009. The next prime is 1000000222037. The reversal of 1000000222021 is 1202220000001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1000000222021 - 2⁷ = 1000000221893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000000221989 and 1000000222007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000000222051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10126081 + ... + 10224358.

It is an arithmetic number, because the mean of its divisors is an integer number (250005155400).

Almost surely, 2^{1000000222021} is an apocalyptic number.

It is an amenable number.

1000000222021 is a deficient number, since it is larger than the sum of its proper divisors (20399579).

1000000222021 is an equidigital number, since it uses as much as digits as its factorization.

1000000222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20399578.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 1000000222021 its reverse (1202220000001), we get a palindrome (2202220222022).

The spelling of 1000000222021 in words is "one trillion, two hundred twenty-two thousand, twenty-one".