1112001221221 has 4 divisors (see below), whose sum is σ = 1213092241344. Its totient is φ = 1010910201100.

The previous prime is 1112001221179. The next prime is 1112001221239. The reversal of 1112001221221 is 1221221002111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1112001221221 - 2¹⁵ = 1112001188453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1112001221195 and 1112001221204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112001221281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50545510045 + ... + 50545510066.

It is an arithmetic number, because the mean of its divisors is an integer number (303273060336).

Almost surely, 2^{1112001221221} is an apocalyptic number.

1112001221221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1112001221221 is a deficient number, since it is larger than the sum of its proper divisors (101091020123).

1112001221221 is a wasteful number, since it uses less digits than its factorization.

1112001221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101091020122.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1112001221221 its reverse (1221221002111), we get a palindrome (2333222223332).

The spelling of 1112001221221 in words is "one trillion, one hundred twelve billion, one million, two hundred twenty-one thousand, two hundred twenty-one".