21332401200 has 180 divisors, whose sum is σ = 80759449368. Its totient is φ = 5171481600.

The previous prime is 21332401177. The next prime is 21332401231. The reversal of 21332401200 is 210423312.

21332401200 is a `hidden beast` number, since 213 + 32 + 401 + 20 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is a super-2 number, since 2×21332401200² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 229749 + ... + 308948.

Almost surely, 2^21332401200 is an apocalyptic number.

21332401200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21332401200 is an abundant number, since it is smaller than the sum of its proper divisors (59427048168).

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

21332401200 is a wasteful number, since it uses less digits than its factorization.

21332401200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538732 (or 538718 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21332401200 its reverse (210423312), we get a palindrome (21542824512).

The spelling of 21332401200 in words is "twenty-one billion, three hundred thirty-two million, four hundred one thousand, two hundred".