12642721142 has 8 divisors (see below), whose sum is σ = 19476624576. Its totient is φ = 6150512952.

The previous prime is 12642721097. The next prime is 12642721151. The reversal of 12642721142 is 24112724621.

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

It is a junction number, because it is equal to n+sod(n) for n = 12642721099 and 12642721108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85423718 + ... + 85423865.

It is an arithmetic number, because the mean of its divisors is an integer number (2434578072).

Almost surely, 2^12642721142 is an apocalyptic number.

12642721142 is a deficient number, since it is larger than the sum of its proper divisors (6833903434).

12642721142 is a wasteful number, since it uses less digits than its factorization.

12642721142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170847622.

The product of its digits is 10752, while the sum is 32.

The spelling of 12642721142 in words is "twelve billion, six hundred forty-two million, seven hundred twenty-one thousand, one hundred forty-two".