21032101200 has 120 divisors (see below), whose sum is σ = 73497679776. Its totient is φ = 5098688000.

The previous prime is 21032101193. The next prime is 21032101229. The reversal of 21032101200 is 210123012.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 783471 + ... + 809870.

Almost surely, 2^21032101200 is an apocalyptic number.

21032101200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21032101200 is an abundant number, since it is smaller than the sum of its proper divisors (52465578576).

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

21032101200 is a wasteful number, since it uses less digits than its factorization.

21032101200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593373 (or 1593362 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21032101200 its reverse (210123012), we get a palindrome (21242224212).

The spelling of 21032101200 in words is "twenty-one billion, thirty-two million, one hundred one thousand, two hundred".