21214050200 has 144 divisors (see below), whose sum is σ = 59227012800. Its totient is φ = 7038662400.

The previous prime is 21214050191. The next prime is 21214050241. The reversal of 21214050200 is 205041212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 268886 + ... + 338714.

It is an arithmetic number, because the mean of its divisors is an integer number (411298700).

Almost surely, 2^21214050200 is an apocalyptic number.

21214050200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21214050200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29613506400).

21214050200 is an abundant number, since it is smaller than the sum of its proper divisors (38012962600).

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

21214050200 is a wasteful number, since it uses less digits than its factorization.

21214050200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69890 (or 69874 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 21214050200 its reverse (205041212), we get a palindrome (21419091412).

The spelling of 21214050200 in words is "twenty-one billion, two hundred fourteen million, fifty thousand, two hundred".