21201211300 has 36 divisors (see below), whose sum is σ = 46337641840. Its totient is φ = 8419468320.

The previous prime is 21201211289. The next prime is 21201211327. The reversal of 21201211300 is 311210212.

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, 748734 + ... + 776533.

Almost surely, 2^21201211300 is an apocalyptic number.

21201211300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201211300 is an abundant number, since it is smaller than the sum of its proper divisors (25136430540).

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

21201211300 is a wasteful number, since it uses less digits than its factorization.

21201211300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525420 (or 1525413 counting only the distinct ones).

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

Adding to 21201211300 its reverse (311210212), we get a palindrome (21512421512).

The spelling of 21201211300 in words is "twenty-one billion, two hundred one million, two hundred eleven thousand, three hundred".