21221032300 has 36 divisors (see below), whose sum is σ = 49591923136. Its totient is φ = 7835457600.

The previous prime is 21221032279. The next prime is 21221032321. The reversal of 21221032300 is 323012212.

It is an interprime number because it is at equal distance from previous prime (21221032279) and next prime (21221032321).

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, 8160636 + ... + 8163235.

Almost surely, 2^21221032300 is an apocalyptic number.

21221032300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21221032300 is an abundant number, since it is smaller than the sum of its proper divisors (28370890836).

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

21221032300 is a wasteful number, since it uses less digits than its factorization.

21221032300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16323898 (or 16323891 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21221032300 its reverse (323012212), we get a palindrome (21544044512).

The spelling of 21221032300 in words is "twenty-one billion, two hundred twenty-one million, thirty-two thousand, three hundred".