12145321442 has 16 divisors (see below), whose sum is σ = 19239111360. Its totient is φ = 5738646672.

The previous prime is 12145321429. The next prime is 12145321451. The reversal of 12145321442 is 24412354121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1586717 + ... + 1594352.

It is an arithmetic number, because the mean of its divisors is an integer number (1202444460).

Almost surely, 2^12145321442 is an apocalyptic number.

12145321442 is a deficient number, since it is larger than the sum of its proper divisors (7093789918).

12145321442 is a wasteful number, since it uses less digits than its factorization.

12145321442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3181177.

The product of its digits is 7680, while the sum is 29.

Adding to 12145321442 its reverse (24412354121), we get a palindrome (36557675563).

The spelling of 12145321442 in words is "twelve billion, one hundred forty-five million, three hundred twenty-one thousand, four hundred forty-two".