21010221300 has 36 divisors (see below), whose sum is σ = 60789574496. Its totient is φ = 5602725600.

The previous prime is 21010221247. The next prime is 21010221313. The reversal of 21010221300 is 312201012.

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 11 ways as a sum of consecutive naturals, for example, 35016736 + ... + 35017335.

Almost surely, 2^21010221300 is an apocalyptic number.

21010221300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010221300 is an abundant number, since it is smaller than the sum of its proper divisors (39779353196).

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

21010221300 is a wasteful number, since it uses less digits than its factorization.

21010221300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70034088 (or 70034081 counting only the distinct ones).

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

Adding to 21010221300 its reverse (312201012), we get a palindrome (21322422312).

The spelling of 21010221300 in words is "twenty-one billion, ten million, two hundred twenty-one thousand, three hundred".