102221000002021 has 2 divisors, whose sum is σ = 102221000002022. Its totient is φ = 102221000002020.

The previous prime is 102221000002007. The next prime is 102221000002049. The reversal of 102221000002021 is 120200000122201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101989013279521 + 231986722500 = 10098961^2 + 481650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102221000002021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102221000001992 and 102221000002010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102221000002061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51110500001010 + 51110500001011.

It is an arithmetic number, because the mean of its divisors is an integer number (51110500001011).

Almost surely, 2^{102221000002021} is an apocalyptic number.

It is an amenable number.

102221000002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102221000002021 is an equidigital number, since it uses as much as digits as its factorization.

102221000002021 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 13.

Adding to 102221000002021 its reverse (120200000122201), we get a palindrome (222421000124222).

The spelling of 102221000002021 in words is "one hundred two trillion, two hundred twenty-one billion, two thousand, twenty-one".