21142313244142 has 32 divisors (see below), whose sum is σ = 31840396896672. Its totient is φ = 10528953176064.

The previous prime is 21142313244071. The next prime is 21142313244163. The reversal of 21142313244142 is 24144231324112.

It is a junction number, because it is equal to n+sod(n) for n = 21142313244098 and 21142313244107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1215555798 + ... + 1215573190.

It is an arithmetic number, because the mean of its divisors is an integer number (995012403021).

Almost surely, 2^{21142313244142} is an apocalyptic number.

21142313244142 is a deficient number, since it is larger than the sum of its proper divisors (10698083652530).

21142313244142 is a wasteful number, since it uses less digits than its factorization.

21142313244142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20292.

The product of its digits is 36864, while the sum is 34.

Adding to 21142313244142 its reverse (24144231324112), we get a palindrome (45286544568254).

The spelling of 21142313244142 in words is "twenty-one trillion, one hundred forty-two billion, three hundred thirteen million, two hundred forty-four thousand, one hundred forty-two".