12201142 has 8 divisors (see below), whose sum is σ = 18433800. Its totient is φ = 6056544.

The previous prime is 12201139. The next prime is 12201143. The reversal of 12201142 is 24110221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12201142² = 297735732208328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201143) 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 3 ways as a sum of consecutive naturals, for example, 21667 + ... + 22222.

It is an arithmetic number, because the mean of its divisors is an integer number (2304225).

Almost surely, 2^12201142 is an apocalyptic number.

12201142 is a deficient number, since it is larger than the sum of its proper divisors (6232658).

12201142 is a wasteful number, since it uses less digits than its factorization.

12201142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44030.

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

The square root of 12201142 is about 3493.0133123136. The cubic root of 12201142 is about 230.2149345572.

Adding to 12201142 its reverse (24110221), we get a palindrome (36311363).

The spelling of 12201142 in words is "twelve million, two hundred one thousand, one hundred forty-two".