21123301333200 has 240 divisors, whose sum is σ = 76197510285312. Its totient is φ = 4955613120000.

The previous prime is 21123301333187. The next prime is 21123301333207. The reversal of 21123301333200 is 233310332112.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123301333207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25401286 + ... + 26219685.

Almost surely, 2^{21123301333200} is an apocalyptic number.

21123301333200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21123301333200 is an abundant number, since it is smaller than the sum of its proper divisors (55074208952112).

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

21123301333200 is a wasteful number, since it uses less digits than its factorization.

21123301333200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51621034 (or 51621023 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21123301333200 its reverse (233310332112), we get a palindrome (21356611665312).

The spelling of 21123301333200 in words is "twenty-one trillion, one hundred twenty-three billion, three hundred one million, three hundred thirty-three thousand, two hundred".