21221414200 has 48 divisors (see below), whose sum is σ = 56388332880. Its totient is φ = 7275912960.

The previous prime is 21221414189. The next prime is 21221414213. The reversal of 21221414200 is 241412212.

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, 7577677 + ... + 7580476.

It is an arithmetic number, because the mean of its divisors is an integer number (1174756935).

Almost surely, 2^21221414200 is an apocalyptic number.

21221414200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21221414200 is an abundant number, since it is smaller than the sum of its proper divisors (35166918680).

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

21221414200 is a wasteful number, since it uses less digits than its factorization.

21221414200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15158176 (or 15158167 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21221414200 its reverse (241412212), we get a palindrome (21462826412).

The spelling of 21221414200 in words is "twenty-one billion, two hundred twenty-one million, four hundred fourteen thousand, two hundred".