21135525301200 has 60 divisors (see below), whose sum is σ = 67704132718688. Its totient is φ = 5636140080000.

The previous prime is 21135525301171. The next prime is 21135525301271. The reversal of 21135525301200 is 210352553112.

21135525301200 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 8806467676 + ... + 8806470075.

Almost surely, 2^{21135525301200} is an apocalyptic number.

21135525301200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21135525301200 is an abundant number, since it is smaller than the sum of its proper divisors (46568607417488).

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

21135525301200 is a wasteful number, since it uses less digits than its factorization.

21135525301200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17612937772 (or 17612937761 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 21135525301200 its reverse (210352553112), we get a palindrome (21345877854312).

The spelling of 21135525301200 in words is "twenty-one trillion, one hundred thirty-five billion, five hundred twenty-five million, three hundred one thousand, two hundred".