21210214134 has 8 divisors (see below), whose sum is σ = 42420428280. Its totient is φ = 7070071376.

The previous prime is 21210214111. The next prime is 21210214139. The reversal of 21210214134 is 43141201212.

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

21210214134 is an admirable number.

It is a super-2 number, since 2×21210214134² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21210214134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210214139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1767517839 + ... + 1767517850.

It is an arithmetic number, because the mean of its divisors is an integer number (5302553535).

Almost surely, 2^21210214134 is an apocalyptic number.

21210214134 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.

21210214134 is a wasteful number, since it uses less digits than its factorization.

21210214134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3535035694.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21210214134 its reverse (43141201212), we get a palindrome (64351415346).

The spelling of 21210214134 in words is "twenty-one billion, two hundred ten million, two hundred fourteen thousand, one hundred thirty-four".