21000132230 has 128 divisors (see below), whose sum is σ = 48299037696. Its totient is φ = 6384268800.

The previous prime is 21000132163. The next prime is 21000132233. The reversal of 21000132230 is 3223100012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000132233) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 7385189 + ... + 7388031.

It is an arithmetic number, because the mean of its divisors is an integer number (377336232).

Almost surely, 2^21000132230 is an apocalyptic number.

21000132230 is an abundant number, since it is smaller than the sum of its proper divisors (27298905466).

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

21000132230 is a wasteful number, since it uses less digits than its factorization.

21000132230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21000132230 its reverse (3223100012), we get a palindrome (24223232242).

The spelling of 21000132230 in words is "twenty-one billion, one hundred thirty-two thousand, two hundred thirty".