11221142 has 4 divisors (see below), whose sum is σ = 16831716. Its totient is φ = 5610570.

The previous prime is 11221141. The next prime is 11221159. The reversal of 11221142 is 24112211.

It is a happy number.

11221142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24112211 = 23 ⋅1048357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2805284 + ... + 2805287.

It is an arithmetic number, because the mean of its divisors is an integer number (4207929).

Almost surely, 2^11221142 is an apocalyptic number.

11221142 is a deficient number, since it is larger than the sum of its proper divisors (5610574).

11221142 is an equidigital number, since it uses as much as digits as its factorization.

11221142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5610573.

The product of its digits is 32, while the sum is 14.

The square root of 11221142 is about 3349.7973073008. The cubic root of 11221142 is about 223.8784816018.

Adding to 11221142 its reverse (24112211), we get a palindrome (35333353).

The spelling of 11221142 in words is "eleven million, two hundred twenty-one thousand, one hundred forty-two".