1000222121021 has 2 divisors, whose sum is σ = 1000222121022. Its totient is φ = 1000222121020.

The previous prime is 1000222120999. The next prime is 1000222121027. The reversal of 1000222121021 is 1201212220001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 826437355396 + 173784765625 = 909086^2 + 416875^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000222121021 - 2¹⁰ = 1000222119997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000222120987 and 1000222121005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000222121027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500111060510 + 500111060511.

It is an arithmetic number, because the mean of its divisors is an integer number (500111060511).

Almost surely, 2^{1000222121021} is an apocalyptic number.

It is an amenable number.

1000222121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000222121021 is an equidigital number, since it uses as much as digits as its factorization.

1000222121021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1000222121021 its reverse (1201212220001), we get a palindrome (2201434341022).

The spelling of 1000222121021 in words is "one trillion, two hundred twenty-two million, one hundred twenty-one thousand, twenty-one".