1122020221221 has 6 divisors (see below), whose sum is σ = 1620695875110. Its totient is φ = 748013480808.

The previous prime is 1122020221213. The next prime is 1122020221243. The reversal of 1122020221221 is 1221220202211.

It is a happy number.

1122020221221 is a `hidden beast` number, since 1 + 1 + 220 + 2 + 0 + 221 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 599247840321 + 522772380900 = 774111^2 + 723030^2 .

It is not a de Polignac number, because 1122020221221 - 2³ = 1122020221213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1122020221194 and 1122020221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122020221921) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62334456726 + ... + 62334456743.

It is an arithmetic number, because the mean of its divisors is an integer number (270115979185).

Almost surely, 2^{1122020221221} is an apocalyptic number.

It is an amenable number.

1122020221221 is a deficient number, since it is larger than the sum of its proper divisors (498675653889).

1122020221221 is a wasteful number, since it uses less digits than its factorization.

1122020221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124668913475 (or 124668913472 counting only the distinct ones).

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

Adding to 1122020221221 its reverse (1221220202211), we get a palindrome (2343240423432).

The spelling of 1122020221221 in words is "one trillion, one hundred twenty-two billion, twenty million, two hundred twenty-one thousand, two hundred twenty-one".