112201212121 has 4 divisors (see below), whose sum is σ = 112207931044. Its totient is φ = 112194493200.

The previous prime is 112201212073. The next prime is 112201212157. The reversal of 112201212121 is 121212102211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121212102211 = 463 ⋅261797197.

It can be written as a sum of positive squares in 2 ways, for example, as 73691074521 + 38510137600 = 271461^2 + 196240^2 .

It is a cyclic number.

It is not a de Polignac number, because 112201212121 - 2¹⁷ = 112201081049 is a prime.

It is a super-2 number, since 2×112201212121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 112201212095 and 112201212104.

It is not an unprimeable number, because it can be changed into a prime (112201212161) 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, 3334350 + ... + 3367831.

It is an arithmetic number, because the mean of its divisors is an integer number (28051982761).

Almost surely, 2^112201212121 is an apocalyptic number.

It is an amenable number.

112201212121 is a deficient number, since it is larger than the sum of its proper divisors (6718923).

112201212121 is an equidigital number, since it uses as much as digits as its factorization.

112201212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6718922.

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

Adding to 112201212121 its reverse (121212102211), we get a palindrome (233413314332).

The spelling of 112201212121 in words is "one hundred twelve billion, two hundred one million, two hundred twelve thousand, one hundred twenty-one".