112220129 has 4 divisors (see below), whose sum is σ = 128251584. Its totient is φ = 96188676.

The previous prime is 112220123. The next prime is 112220131. The reversal of 112220129 is 921022211.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-112220129 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 112220129.

It is not an unprimeable number, because it can be changed into a prime (112220123) 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, 8015717 + ... + 8015730.

It is an arithmetic number, because the mean of its divisors is an integer number (32062896).

Almost surely, 2^112220129 is an apocalyptic number.

It is an amenable number.

112220129 is a deficient number, since it is larger than the sum of its proper divisors (16031455).

112220129 is an equidigital number, since it uses as much as digits as its factorization.

112220129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16031454.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 112220129 is about 10593.4002567636. The cubic root of 112220129 is about 482.3440450987.

The spelling of 112220129 in words is "one hundred twelve million, two hundred twenty thousand, one hundred twenty-nine".