1000002205021 has 2 divisors, whose sum is σ = 1000002205022. Its totient is φ = 1000002205020.

The previous prime is 1000002205001. The next prime is 1000002205079. The reversal of 1000002205021 is 1205022000001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 720784020100 + 279218184921 = 848990^2 + 528411^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000002205021 - 2¹⁷ = 1000002073949 is a prime.

It is a super-2 number, since 2×1000002205021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1000002204992 and 1000002205010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000002205001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500001102510 + 500001102511.

It is an arithmetic number, because the mean of its divisors is an integer number (500001102511).

Almost surely, 2^{1000002205021} is an apocalyptic number.

It is an amenable number.

1000002205021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000002205021 is an equidigital number, since it uses as much as digits as its factorization.

1000002205021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 13.

Adding to 1000002205021 its reverse (1205022000001), we get a palindrome (2205024205022).

The spelling of 1000002205021 in words is "one trillion, two million, two hundred five thousand, twenty-one".