12221333542 has 16 divisors (see below), whose sum is σ = 20027099664. Its totient is φ = 5547220000.

The previous prime is 12221333533. The next prime is 12221333549. The reversal of 12221333542 is 24533312221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12221333542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221333549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380809 + ... + 411652.

It is an arithmetic number, because the mean of its divisors is an integer number (1251693729).

Almost surely, 2^12221333542 is an apocalyptic number.

12221333542 is a deficient number, since it is larger than the sum of its proper divisors (7805766122).

12221333542 is a wasteful number, since it uses less digits than its factorization.

12221333542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793175.

The product of its digits is 8640, while the sum is 28.

Adding to 12221333542 its reverse (24533312221), we get a palindrome (36754645763).

The spelling of 12221333542 in words is "twelve billion, two hundred twenty-one million, three hundred thirty-three thousand, five hundred forty-two".