2002205021 has 2 divisors, whose sum is σ = 2002205022. Its totient is φ = 2002205020.

The previous prime is 2002204999. The next prime is 2002205027. The reversal of 2002205021 is 1205022002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1062108100 + 940096921 = 32590^2 + 30661^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002205021 - 2¹⁰ = 2002203997 is a prime.

It is a super-2 number, since 2×2002205021² = 8017649892235220882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2002204987 and 2002205005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002205027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001102510 + 1001102511.

It is an arithmetic number, because the mean of its divisors is an integer number (1001102511).

Almost surely, 2^2002205021 is an apocalyptic number.

It is an amenable number.

2002205021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002205021 is an equidigital number, since it uses as much as digits as its factorization.

2002205021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2002205021 is about 44746.0056429621. The cubic root of 2002205021 is about 1260.3839052311.

Adding to 2002205021 its reverse (1205022002), we get a palindrome (3207227023).

The spelling of 2002205021 in words is "two billion, two million, two hundred five thousand, twenty-one".