1112211121221 has 12 divisors (see below), whose sum is σ = 1649946828972. Its totient is φ = 721434240576.

The previous prime is 1112211121213. The next prime is 1112211121237. The reversal of 1112211121221 is 1221211122111.

It is a happy number.

1112211121221 is a `hidden beast` number, since 1 + 112 + 211 + 121 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1072933430625 + 39277690596 = 1035825^2 + 198186^2 .

It is not a de Polignac number, because 1112211121221 - 2³ = 1112211121213 is a prime.

It is a super-3 number, since 3×1112211121221³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1112211121194 and 1112211121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112211121321) 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 11 ways as a sum of consecutive naturals, for example, 1669986336 + ... + 1669987001.

It is an arithmetic number, because the mean of its divisors is an integer number (137495569081).

Almost surely, 2^{1112211121221} is an apocalyptic number.

It is an amenable number.

1112211121221 is a deficient number, since it is larger than the sum of its proper divisors (537735707751).

1112211121221 is a wasteful number, since it uses less digits than its factorization.

1112211121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3339973380 (or 3339973377 counting only the distinct ones).

The product of its digits is 32, while the sum is 18.

Adding to 1112211121221 its reverse (1221211122111), we get a palindrome (2333422243332).

The spelling of 1112211121221 in words is "one trillion, one hundred twelve billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twenty-one".