21424104133142 has 4 divisors (see below), whose sum is σ = 32136156199716. Its totient is φ = 10712052066570.

The previous prime is 21424104133141. The next prime is 21424104133283. The reversal of 21424104133142 is 24133140142412.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21424104133099 and 21424104133108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21424104133141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5356026033284 + ... + 5356026033287.

It is an arithmetic number, because the mean of its divisors is an integer number (8034039049929).

Almost surely, 2^{21424104133142} is an apocalyptic number.

21424104133142 is a deficient number, since it is larger than the sum of its proper divisors (10712052066574).

21424104133142 is a wasteful number, since it uses less digits than its factorization.

21424104133142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10712052066573.

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 21424104133142 its reverse (24133140142412), we get a palindrome (45557244275554).

The spelling of 21424104133142 in words is "twenty-one trillion, four hundred twenty-four billion, one hundred four million, one hundred thirty-three thousand, one hundred forty-two".