21012134230 has 8 divisors (see below), whose sum is σ = 37821841632. Its totient is φ = 8404853688.

The previous prime is 21012134183. The next prime is 21012134261. The reversal of 21012134230 is 3243121012.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21012134198 and 21012134207.

It is a congruent number.

It is an unprimeable number.

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, 1050606702 + ... + 1050606721.

It is an arithmetic number, because the mean of its divisors is an integer number (4727730204).

Almost surely, 2^21012134230 is an apocalyptic number.

21012134230 is a deficient number, since it is larger than the sum of its proper divisors (16809707402).

21012134230 is a wasteful number, since it uses less digits than its factorization.

21012134230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101213430.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21012134230 its reverse (3243121012), we get a palindrome (24255255242).

The spelling of 21012134230 in words is "twenty-one billion, twelve million, one hundred thirty-four thousand, two hundred thirty".