11220129 has 12 divisors (see below), whose sum is σ = 16766100. Its totient is φ = 7221984.

The previous prime is 11220107. The next prime is 11220137. The reversal of 11220129 is 92102211.

It can be written as a sum of positive squares in 2 ways, for example, as 5531904 + 5688225 = 2352^2 + 2385^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11220129 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11220149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21234 + ... + 21755.

It is an arithmetic number, because the mean of its divisors is an integer number (1397175).

Almost surely, 2^11220129 is an apocalyptic number.

It is an amenable number.

11220129 is a deficient number, since it is larger than the sum of its proper divisors (5545971).

11220129 is a wasteful number, since it uses less digits than its factorization.

11220129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43024 (or 43021 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 11220129 is about 3349.6461007097. The cubic root of 11220129 is about 223.8717444466.

The spelling of 11220129 in words is "eleven million, two hundred twenty thousand, one hundred twenty-nine".