112112021221 has 4 divisors (see below), whose sum is σ = 112149382444. Its totient is φ = 112074660000.

The previous prime is 112112021179. The next prime is 112112021237. The reversal of 112112021221 is 122120211211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70705469025 + 41406552196 = 265905^2 + 203486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112112021221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112112021195 and 112112021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112112021251) 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, 18676110 + ... + 18682111.

It is an arithmetic number, because the mean of its divisors is an integer number (28037345611).

Almost surely, 2^112112021221 is an apocalyptic number.

It is an amenable number.

112112021221 is a deficient number, since it is larger than the sum of its proper divisors (37361223).

112112021221 is an equidigital number, since it uses as much as digits as its factorization.

112112021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37361222.

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

Adding to 112112021221 its reverse (122120211211), we get a palindrome (234232232432).

The spelling of 112112021221 in words is "one hundred twelve billion, one hundred twelve million, twenty-one thousand, two hundred twenty-one".