112212211121221 has 4 divisors (see below), whose sum is σ = 114599704974912. Its totient is φ = 109824717267532.

The previous prime is 112212211121117. The next prime is 112212211121389. The reversal of 112212211121221 is 122121112212211.

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 112212211121221 - 2⁷ = 112212211121093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112212211121192 and 112212211121201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112212211121921) 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, 1193746926775 + ... + 1193746926868.

It is an arithmetic number, because the mean of its divisors is an integer number (28649926243728).

Almost surely, 2^{112212211121221} is an apocalyptic number.

It is an amenable number.

112212211121221 is a deficient number, since it is larger than the sum of its proper divisors (2387493853691).

112212211121221 is an equidigital number, since it uses as much as digits as its factorization.

112212211121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387493853690.

The product of its digits is 128, while the sum is 22.

Adding to 112212211121221 its reverse (122121112212211), we get a palindrome (234333323333432).

The spelling of 112212211121221 in words is "one hundred twelve trillion, two hundred twelve billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twenty-one".