21120034134 has 8 divisors (see below), whose sum is σ = 42240068280. Its totient is φ = 7040011376.

The previous prime is 21120034127. The next prime is 21120034147. The reversal of 21120034134 is 43143002112.

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

21120034134 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21120034134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1760002839 + ... + 1760002850.

It is an arithmetic number, because the mean of its divisors is an integer number (5280008535).

Almost surely, 2^21120034134 is an apocalyptic number.

21120034134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21120034134 is a wasteful number, since it uses less digits than its factorization.

21120034134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3520005694.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21120034134 its reverse (43143002112), we get a palindrome (64263036246).

The spelling of 21120034134 in words is "twenty-one billion, one hundred twenty million, thirty-four thousand, one hundred thirty-four".