21120233200 has 60 divisors (see below), whose sum is σ = 55354222728. Its totient is φ = 7680083200.

The previous prime is 21120233171. The next prime is 21120233201. The reversal of 21120233200 is 233202112.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120233201) 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, 2395627 + ... + 2404426.

Almost surely, 2^21120233200 is an apocalyptic number.

21120233200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120233200 is an abundant number, since it is smaller than the sum of its proper divisors (34233989528).

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

21120233200 is a wasteful number, since it uses less digits than its factorization.

21120233200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4800082 (or 4800071 counting only the distinct ones).

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

Adding to 21120233200 its reverse (233202112), we get a palindrome (21353435312).

The spelling of 21120233200 in words is "twenty-one billion, one hundred twenty million, two hundred thirty-three thousand, two hundred".