21021232300 has 36 divisors (see below), whose sum is σ = 45626880040. Its totient is φ = 8406501120.

The previous prime is 21021232279. The next prime is 21021232301. The reversal of 21021232300 is 323212012.

It is not an unprimeable number, because it can be changed into a prime (21021232301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 443131 + ... + 488269.

Almost surely, 2^21021232300 is an apocalyptic number.

21021232300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21021232300 is an abundant number, since it is smaller than the sum of its proper divisors (24605647740).

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

21021232300 is a wasteful number, since it uses less digits than its factorization.

21021232300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49810 (or 49803 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21021232300 its reverse (323212012), we get a palindrome (21344444312).

The spelling of 21021232300 in words is "twenty-one billion, twenty-one million, two hundred thirty-two thousand, three hundred".