12321220142 has 32 divisors (see below), whose sum is σ = 23061265920. Its totient is φ = 4796520480.

The previous prime is 12321220141. The next prime is 12321220159. The reversal of 12321220142 is 24102212321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321220141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158159 + ... + 222837.

It is an arithmetic number, because the mean of its divisors is an integer number (720664560).

Almost surely, 2^12321220142 is an apocalyptic number.

12321220142 is a deficient number, since it is larger than the sum of its proper divisors (10740045778).

12321220142 is a wasteful number, since it uses less digits than its factorization.

12321220142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65936.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12321220142 its reverse (24102212321), we get a palindrome (36423432463).

The spelling of 12321220142 in words is "twelve billion, three hundred twenty-one million, two hundred twenty thousand, one hundred forty-two".