221002101220122 has 24 divisors (see below), whose sum is σ = 491779450464276. Its totient is φ = 71676357152256.

The previous prime is 221002101220091. The next prime is 221002101220163. The reversal of 221002101220122 is 221022101200122.

It is a happy number.

221002101220122 is a `hidden beast` number, since 2 + 210 + 0 + 210 + 1 + 220 + 1 + 22 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 216071742985641 + 4930358234481 = 14699379^2 + 2220441^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221002101220095 and 221002101220104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165917492743 + ... + 165917494074.

Almost surely, 2^{221002101220122} is an apocalyptic number.

221002101220122 is an abundant number, since it is smaller than the sum of its proper divisors (270777349244154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221002101220122 is a wasteful number, since it uses less digits than its factorization.

221002101220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331834986862 (or 331834986859 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221002101220122 its reverse (221022101200122), we get a palindrome (442024202420244).

The spelling of 221002101220122 in words is "two hundred twenty-one trillion, two billion, one hundred one million, two hundred twenty thousand, one hundred twenty-two".