20002202021 has 2 divisors, whose sum is σ = 20002202022. Its totient is φ = 20002202020.

The previous prime is 20002201963. The next prime is 20002202039. The reversal of 20002202021 is 12020220002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18596776900 + 1405425121 = 136370^2 + 37489^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002202021 - 2⁶ = 20002201957 is a prime.

It is a super-3 number, since 3×20002202021³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20002201993 and 20002202011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20002202041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001101010 + 10001101011.

It is an arithmetic number, because the mean of its divisors is an integer number (10001101011).

Almost surely, 2^20002202021 is an apocalyptic number.

It is an amenable number.

20002202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002202021 is an equidigital number, since it uses as much as digits as its factorization.

20002202021 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 11.

Adding to 20002202021 its reverse (12020220002), we get a palindrome (32022422023).

The spelling of 20002202021 in words is "twenty billion, two million, two hundred two thousand, twenty-one".