21013001203200 has 120 divisors (see below), whose sum is σ = 69415136289048. Its totient is φ = 5603466977280.

The previous prime is 21013001203199. The next prime is 21013001203213. The reversal of 21013001203200 is 230210031012.

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 (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21013001203200.

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, 273568387 + ... + 273645186.

Almost surely, 2^{21013001203200} is an apocalyptic number.

21013001203200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21013001203200 is an abundant number, since it is smaller than the sum of its proper divisors (48402135085848).

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

21013001203200 is an equidigital number, since it uses as much as digits as its factorization.

21013001203200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547213604 (or 547213583 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21013001203200 its reverse (230210031012), we get a palindrome (21243211234212).

The spelling of 21013001203200 in words is "twenty-one trillion, thirteen billion, one million, two hundred three thousand, two hundred".