21230133220 has 96 divisors (see below), whose sum is σ = 45926673408. Its totient is φ = 8240952192.

The previous prime is 21230133191. The next prime is 21230133229. The reversal of 21230133220 is 2233103212.

It is not an unprimeable number, because it can be changed into a prime (21230133229) 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 31 ways as a sum of consecutive naturals, for example, 37708659 + ... + 37709221.

It is an arithmetic number, because the mean of its divisors is an integer number (478402848).

Almost surely, 2^21230133220 is an apocalyptic number.

21230133220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230133220 is an abundant number, since it is smaller than the sum of its proper divisors (24696540188).

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

21230133220 is a wasteful number, since it uses less digits than its factorization.

21230133220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21230133220 its reverse (2233103212), we get a palindrome (23463236432).

The spelling of 21230133220 in words is "twenty-one billion, two hundred thirty million, one hundred thirty-three thousand, two hundred twenty".