112122221221 has 8 divisors (see below), whose sum is σ = 113260001400. Its totient is φ = 110989578432.

The previous prime is 112122221213. The next prime is 112122221273. The reversal of 112122221221 is 122122221211.

It can be written as a sum of positive squares in 4 ways, for example, as 59504284225 + 52617936996 = 243935^2 + 229386^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 112122221221 - 2³ = 112122221213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112122221291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1240470 + ... + 1327783.

It is an arithmetic number, because the mean of its divisors is an integer number (14157500175).

Almost surely, 2^112122221221 is an apocalyptic number.

It is an amenable number.

112122221221 is a deficient number, since it is larger than the sum of its proper divisors (1137780179).

112122221221 is a wasteful number, since it uses less digits than its factorization.

112122221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568695.

The product of its digits is 128, while the sum is 19.

Adding to 112122221221 its reverse (122122221211), we get a palindrome (234244442432).

The spelling of 112122221221 in words is "one hundred twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-one".