102122200020221 has 4 divisors (see below), whose sum is σ = 103796334446844. Its totient is φ = 100448065593600.

The previous prime is 102122200020167. The next prime is 102122200020263. The reversal of 102122200020221 is 122020002221201.

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 54760207200196 + 47361992820025 = 7400014^2 + 6882005^2 .

It is a cyclic number.

It is not a de Polignac number, because 102122200020221 - 2⁴² = 97724153509117 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 102122200020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102122200020121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837067213220 + ... + 837067213341.

It is an arithmetic number, because the mean of its divisors is an integer number (25949083611711).

Almost surely, 2^{102122200020221} is an apocalyptic number.

It is an amenable number.

102122200020221 is a deficient number, since it is larger than the sum of its proper divisors (1674134426623).

102122200020221 is an equidigital number, since it uses as much as digits as its factorization.

102122200020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674134426622.

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

Adding to 102122200020221 its reverse (122020002221201), we get a palindrome (224142202241422).

The spelling of 102122200020221 in words is "one hundred two trillion, one hundred twenty-two billion, two hundred million, twenty thousand, two hundred twenty-one".