1112112011221 has 4 divisors (see below), whose sum is σ = 1112115486112. Its totient is φ = 1112108536332.

The previous prime is 1112112011203. The next prime is 1112112011237. The reversal of 1112112011221 is 1221102112111.

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 1112112011221 - 2¹³ = 1112112003029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1112112011195 and 1112112011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1112112011201) 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, 1202475 + ... + 1915768.

It is an arithmetic number, because the mean of its divisors is an integer number (278028871528).

Almost surely, 2^{1112112011221} is an apocalyptic number.

It is an amenable number.

1112112011221 is a deficient number, since it is larger than the sum of its proper divisors (3474891).

1112112011221 is an equidigital number, since it uses as much as digits as its factorization.

1112112011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474890.

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

Adding to 1112112011221 its reverse (1221102112111), we get a palindrome (2333214123332).

The spelling of 1112112011221 in words is "one trillion, one hundred twelve billion, one hundred twelve million, eleven thousand, two hundred twenty-one".