112220212121 has 4 divisors (see below), whose sum is σ = 112222017744. Its totient is φ = 112218406500.

The previous prime is 112220212081. The next prime is 112220212127. The reversal of 112220212121 is 121212022211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 112220212121 - 2¹⁰ = 112220211097 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 112220212121.

It is not an unprimeable number, because it can be changed into a prime (112220212127) 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, 806135 + ... + 935036.

It is an arithmetic number, because the mean of its divisors is an integer number (28055504436).

Almost surely, 2^112220212121 is an apocalyptic number.

It is an amenable number.

112220212121 is a deficient number, since it is larger than the sum of its proper divisors (1805623).

112220212121 is an equidigital number, since it uses as much as digits as its factorization.

112220212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805622.

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

Adding to 112220212121 its reverse (121212022211), we get a palindrome (233432234332).

The spelling of 112220212121 in words is "one hundred twelve billion, two hundred twenty million, two hundred twelve thousand, one hundred twenty-one".