112121201221 has 4 divisors (see below), whose sum is σ = 112159353600. Its totient is φ = 112083048844.

The previous prime is 112121201191. The next prime is 112121201249. The reversal of 112121201221 is 122102121211.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122102121211 = 7 ⋅17443160173.

It is a cyclic number.

It is not a de Polignac number, because 112121201221 - 2¹¹ = 112121199173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112121201195 and 112121201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112121201261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19071781 + ... + 19077658.

It is an arithmetic number, because the mean of its divisors is an integer number (28039838400).

Almost surely, 2^112121201221 is an apocalyptic number.

It is an amenable number.

112121201221 is a deficient number, since it is larger than the sum of its proper divisors (38152379).

112121201221 is an equidigital number, since it uses as much as digits as its factorization.

112121201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38152378.

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

Adding to 112121201221 its reverse (122102121211), we get a palindrome (234223322432).

The spelling of 112121201221 in words is "one hundred twelve billion, one hundred twenty-one million, two hundred one thousand, two hundred twenty-one".