21203001101200 has 30 divisors (see below), whose sum is σ = 50940210146594. Its totient is φ = 8481200440320.

The previous prime is 21203001101179. The next prime is 21203001101213. The reversal of 21203001101200 is 210110030212.

It can be written as a sum of positive squares in 3 ways, for example, as 244953725184 + 20958047376016 = 494928^2 + 4577996^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26503750977 + ... + 26503751776.

Almost surely, 2^{21203001101200} is an apocalyptic number.

21203001101200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21203001101200 is an abundant number, since it is smaller than the sum of its proper divisors (29737209045394).

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

21203001101200 is a wasteful number, since it uses less digits than its factorization.

21203001101200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53007502771 (or 53007502760 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21203001101200 its reverse (210110030212), we get a palindrome (21413111131412).

The spelling of 21203001101200 in words is "twenty-one trillion, two hundred three billion, one million, one hundred one thousand, two hundred".