102000221220221 has 4 divisors (see below), whose sum is σ = 102014130980892. Its totient is φ = 101986311459552.

The previous prime is 102000221220169. The next prime is 102000221220307. The reversal of 102000221220221 is 122022122000201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3164591944900 + 98835629275321 = 1778930^2 + 9941611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102000221220221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102000221220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102000221420221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6954869336 + ... + 6954884001.

It is an arithmetic number, because the mean of its divisors is an integer number (25503532745223).

Almost surely, 2^{102000221220221} is an apocalyptic number.

It is an amenable number.

102000221220221 is a deficient number, since it is larger than the sum of its proper divisors (13909760671).

102000221220221 is an equidigital number, since it uses as much as digits as its factorization.

102000221220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13909760670.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 102000221220221 its reverse (122022122000201), we get a palindrome (224022343220422).

The spelling of 102000221220221 in words is "one hundred two trillion, two hundred twenty-one million, two hundred twenty thousand, two hundred twenty-one".