21113134342 has 8 divisors (see below), whose sum is σ = 31672094256. Its totient is φ = 10555769592.

The previous prime is 21113134337. The next prime is 21113134351. The reversal of 21113134342 is 24343131112.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365133 + ... + 418984.

It is an arithmetic number, because the mean of its divisors is an integer number (3959011782).

Almost surely, 2^21113134342 is an apocalyptic number.

21113134342 is a deficient number, since it is larger than the sum of its proper divisors (10558959914).

21113134342 is a wasteful number, since it uses less digits than its factorization.

21113134342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797582.

The product of its digits is 1728, while the sum is 25.

Adding to 21113134342 its reverse (24343131112), we get a palindrome (45456265454).

The spelling of 21113134342 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty-four thousand, three hundred forty-two".