21112423354142 has 32 divisors (see below), whose sum is σ = 33591677422464. Its totient is φ = 9917438169600.

The previous prime is 21112423354129. The next prime is 21112423354189. The reversal of 21112423354142 is 24145332421112.

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, 58161467 + ... + 58523337.

It is an arithmetic number, because the mean of its divisors is an integer number (1049739919452).

Almost surely, 2^{21112423354142} is an apocalyptic number.

21112423354142 is a deficient number, since it is larger than the sum of its proper divisors (12479254068322).

21112423354142 is a wasteful number, since it uses less digits than its factorization.

21112423354142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364964.

The product of its digits is 46080, while the sum is 35.

Adding to 21112423354142 its reverse (24145332421112), we get a palindrome (45257755775254).

The spelling of 21112423354142 in words is "twenty-one trillion, one hundred twelve billion, four hundred twenty-three million, three hundred fifty-four thousand, one hundred forty-two".