12021142 has 32 divisors (see below), whose sum is σ = 22254912. Its totient is φ = 4752384.

The previous prime is 12021131. The next prime is 12021179. The reversal of 12021142 is 24112021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12138 + ... + 13090.

It is an arithmetic number, because the mean of its divisors is an integer number (695466).

Almost surely, 2^12021142 is an apocalyptic number.

12021142 is a deficient number, since it is larger than the sum of its proper divisors (10233770).

12021142 is a wasteful number, since it uses less digits than its factorization.

12021142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032.

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

The square root of 12021142 is about 3467.1518570723. The cubic root of 12021142 is about 229.0772226739.

Adding to 12021142 its reverse (24112021), we get a palindrome (36133163).

The spelling of 12021142 in words is "twelve million, twenty-one thousand, one hundred forty-two".