1112221021221 has 24 divisors (see below), whose sum is σ = 1651983068736. Its totient is φ = 720645168960.

The previous prime is 1112221021213. The next prime is 1112221021277. The reversal of 1112221021221 is 1221201222111.

It is not a de Polignac number, because 1112221021221 - 2³ = 1112221021213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1112221021194 and 1112221021203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112221020221) 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 23 ways as a sum of consecutive naturals, for example, 5633275 + ... + 5827368.

It is an arithmetic number, because the mean of its divisors is an integer number (68832627864).

Almost surely, 2^{1112221021221} is an apocalyptic number.

It is an amenable number.

1112221021221 is a deficient number, since it is larger than the sum of its proper divisors (539762047515).

1112221021221 is a wasteful number, since it uses less digits than its factorization.

1112221021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11460953 (or 11460950 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1112221021221 its reverse (1221201222111), we get a palindrome (2333422243332).

The spelling of 1112221021221 in words is "one trillion, one hundred twelve billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty-one".