21232112134 has 8 divisors (see below), whose sum is σ = 33524387640. Its totient is φ = 10057316256.

The previous prime is 21232112129. The next prime is 21232112173. The reversal of 21232112134 is 43121123212.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279369859 + ... + 279369934.

It is an arithmetic number, because the mean of its divisors is an integer number (4190548455).

Almost surely, 2^21232112134 is an apocalyptic number.

21232112134 is a deficient number, since it is larger than the sum of its proper divisors (12292275506).

21232112134 is a wasteful number, since it uses less digits than its factorization.

21232112134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558739814.

The product of its digits is 576, while the sum is 22.

Adding to 21232112134 its reverse (43121123212), we get a palindrome (64353235346).

The spelling of 21232112134 in words is "twenty-one billion, two hundred thirty-two million, one hundred twelve thousand, one hundred thirty-four".