1222012102221 has 6 divisors (see below), whose sum is σ = 1765128592110. Its totient is φ = 814674734808.

The previous prime is 1222012102219. The next prime is 1222012102231.

It is a happy number.

1222012102221 is a `hidden beast` number, since 12 + 220 + 1 + 210 + 2 + 221 = 666.

1222012102221 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 878698137321 + 343313964900 = 937389^2 + 585930^2 .

It is not a de Polignac number, because 1222012102221 - 2¹ = 1222012102219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222012102194 and 1222012102203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222012102231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67889561226 + ... + 67889561243.

It is an arithmetic number, because the mean of its divisors is an integer number (294188098685).

Almost surely, 2^{1222012102221} is an apocalyptic number.

It is an amenable number.

1222012102221 is a deficient number, since it is larger than the sum of its proper divisors (543116489889).

1222012102221 is a wasteful number, since it uses less digits than its factorization.

1222012102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135779122475 (or 135779122472 counting only the distinct ones).

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

The spelling of 1222012102221 in words is "one trillion, two hundred twenty-two billion, twelve million, one hundred two thousand, two hundred twenty-one".