112120212221 has 4 divisors (see below), whose sum is σ = 112182468444. Its totient is φ = 112057956000.

The previous prime is 112120212199. The next prime is 112120212227. The reversal of 112120212221 is 122212021211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122212021211 = 7 ⋅17458860173.

It can be written as a sum of positive squares in 2 ways, for example, as 15934012900 + 96186199321 = 126230^2 + 310139^2 .

It is a cyclic number.

It is not a de Polignac number, because 112120212221 - 2²² = 112116017917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 112120212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112120212227) 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, 31125410 + ... + 31129011.

It is an arithmetic number, because the mean of its divisors is an integer number (28045617111).

Almost surely, 2^112120212221 is an apocalyptic number.

It is an amenable number.

112120212221 is a deficient number, since it is larger than the sum of its proper divisors (62256223).

112120212221 is an equidigital number, since it uses as much as digits as its factorization.

112120212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62256222.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 112120212221 its reverse (122212021211), we get a palindrome (234332233432).

The spelling of 112120212221 in words is "one hundred twelve billion, one hundred twenty million, two hundred twelve thousand, two hundred twenty-one".