21231223300 has 36 divisors (see below), whose sum is σ = 52653435520. Its totient is φ = 7279276320.

The previous prime is 21231223291. The next prime is 21231223393. The reversal of 21231223300 is 332213212.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15164460 + ... + 15165859.

Almost surely, 2^21231223300 is an apocalyptic number.

21231223300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21231223300 is an abundant number, since it is smaller than the sum of its proper divisors (31422212220).

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

21231223300 is a wasteful number, since it uses less digits than its factorization.

21231223300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30330340 (or 30330333 counting only the distinct ones).

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

Adding to 21231223300 its reverse (332213212), we get a palindrome (21563436512).

The spelling of 21231223300 in words is "twenty-one billion, two hundred thirty-one million, two hundred twenty-three thousand, three hundred".