202000220021 has 2 divisors, whose sum is σ = 202000220022. Its totient is φ = 202000220020.

The previous prime is 202000219969. The next prime is 202000220039. The reversal of 202000220021 is 120022000202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161675563921 + 40324656100 = 402089^2 + 200810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202000220021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202000219984 and 202000220011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202000250021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101000110010 + 101000110011.

It is an arithmetic number, because the mean of its divisors is an integer number (101000110011).

Almost surely, 2^202000220021 is an apocalyptic number.

It is an amenable number.

202000220021 is a deficient number, since it is larger than the sum of its proper divisors (1).

202000220021 is an equidigital number, since it uses as much as digits as its factorization.

202000220021 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 202000220021 its reverse (120022000202), we get a palindrome (322022220223).

The spelling of 202000220021 in words is "two hundred two billion, two hundred twenty thousand, twenty-one".