2002222220021 has 2 divisors, whose sum is σ = 2002222220022. Its totient is φ = 2002222220020.

The previous prime is 2002222219997. The next prime is 2002222220027. The reversal of 2002222220021 is 1200222222002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1828212268996 + 174009951025 = 1352114^2 + 417145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2002222220021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002222220027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001111110010 + 1001111110011.

It is an arithmetic number, because the mean of its divisors is an integer number (1001111110011).

Almost surely, 2^{2002222220021} is an apocalyptic number.

It is an amenable number.

2002222220021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002222220021 is an equidigital number, since it uses as much as digits as its factorization.

2002222220021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 2002222220021 its reverse (1200222222002), we get a palindrome (3202444442023).

The spelling of 2002222220021 in words is "two trillion, two billion, two hundred twenty-two million, two hundred twenty thousand, twenty-one".