102220120002221 has 4 divisors (see below), whose sum is σ = 110083206156252. Its totient is φ = 94357033848192.

The previous prime is 102220120002181. The next prime is 102220120002227. The reversal of 102220120002221 is 122200021022201.

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 20258874972196 + 81961245030025 = 4500986^2 + 9053245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102220120002221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102220120002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102220120002227) 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, 3931543076996 + ... + 3931543077021.

It is an arithmetic number, because the mean of its divisors is an integer number (27520801539063).

Almost surely, 2^{102220120002221} is an apocalyptic number.

It is an amenable number.

102220120002221 is a deficient number, since it is larger than the sum of its proper divisors (7863086154031).

102220120002221 is an equidigital number, since it uses as much as digits as its factorization.

102220120002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7863086154030.

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

Adding to 102220120002221 its reverse (122200021022201), we get a palindrome (224420141024422).

The spelling of 102220120002221 in words is "one hundred two trillion, two hundred twenty billion, one hundred twenty million, two thousand, two hundred twenty-one".