213243021200 has 120 divisors (see below), whose sum is σ = 559495368576. Its totient is φ = 77459008000.

The previous prime is 213243021181. The next prime is 213243021209. The reversal of 213243021200 is 2120342312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (213243021209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4114649 + ... + 4166151.

Almost surely, 2^213243021200 is an apocalyptic number.

213243021200 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 213243021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279747684288).

213243021200 is an abundant number, since it is smaller than the sum of its proper divisors (346252347376).

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

213243021200 is a wasteful number, since it uses less digits than its factorization.

213243021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52473 (or 52462 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 213243021200 its reverse (2120342312), we get a palindrome (215363363512).

The spelling of 213243021200 in words is "two hundred thirteen billion, two hundred forty-three million, twenty-one thousand, two hundred".