102220122221221 has 8 divisors (see below), whose sum is σ = 102410164235000. Its totient is φ = 102030084250560.

The previous prime is 102220122221213. The next prime is 102220122221293. The reversal of 102220122221221 is 122122221022201.

It can be written as a sum of positive squares in 4 ways, for example, as 2955046950625 + 99265075270596 = 1719025^2 + 9963186^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102220122221221 - 2³ = 102220122221213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102220122221192 and 102220122221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102220122221521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52202155 + ... + 54124903.

It is an arithmetic number, because the mean of its divisors is an integer number (12801270529375).

Almost surely, 2^{102220122221221} is an apocalyptic number.

It is an amenable number.

102220122221221 is a deficient number, since it is larger than the sum of its proper divisors (190042013779).

102220122221221 is an equidigital number, since it uses as much as digits as its factorization.

102220122221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021559.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 102220122221221 its reverse (122122221022201), we get a palindrome (224342343243422).

The spelling of 102220122221221 in words is "one hundred two trillion, two hundred twenty billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-one".