112321212121 has 2 divisors, whose sum is σ = 112321212122. Its totient is φ = 112321212120.

The previous prime is 112321212013. The next prime is 112321212173. The reversal of 112321212121 is 121212123211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105325562521 + 6995649600 = 324539^2 + 83640^2 .

It is an emirp because it is prime and its reverse (121212123211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 112321212121 - 2²⁵ = 112287657689 is a prime.

It is not a weakly prime, because it can be changed into another prime (112321212191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56160606060 + 56160606061.

It is an arithmetic number, because the mean of its divisors is an integer number (56160606061).

Almost surely, 2^112321212121 is an apocalyptic number.

It is an amenable number.

112321212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

112321212121 is an equidigital number, since it uses as much as digits as its factorization.

112321212121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 19.

Adding to 112321212121 its reverse (121212123211), we get a palindrome (233533335332).

The spelling of 112321212121 in words is "one hundred twelve billion, three hundred twenty-one million, two hundred twelve thousand, one hundred twenty-one".