11220142 has 16 divisors (see below), whose sum is σ = 17336592. Its totient is φ = 5442880.

The previous prime is 11220137. The next prime is 11220149. The reversal of 11220142 is 24102211.

It is a happy number.

It is a congruent 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23793 + ... + 24259.

It is an arithmetic number, because the mean of its divisors is an integer number (1083537).

Almost surely, 2^11220142 is an apocalyptic number.

11220142 is a deficient number, since it is larger than the sum of its proper divisors (6116450).

11220142 is a wasteful number, since it uses less digits than its factorization.

11220142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 11220142 is about 3349.6480412127. The cubic root of 11220142 is about 223.8718309082.

Adding to 11220142 its reverse (24102211), we get a palindrome (35322353).

The spelling of 11220142 in words is "eleven million, two hundred twenty thousand, one hundred forty-two".