213113203212 has 192 divisors, whose sum is σ = 639436621824. Its totient is φ = 53693798400.

The previous prime is 213113203187. The next prime is 213113203217. The reversal of 213113203212 is 212302311312.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (213113203217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21519462 + ... + 21529362.

It is an arithmetic number, because the mean of its divisors is an integer number (3330399072).

Almost surely, 2^213113203212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213113203212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319718310912).

213113203212 is an abundant number, since it is smaller than the sum of its proper divisors (426323418612).

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

213113203212 is a wasteful number, since it uses less digits than its factorization.

213113203212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10808 (or 10806 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 213113203212 its reverse (212302311312), we get a palindrome (425415514524).

The spelling of 213113203212 in words is "two hundred thirteen billion, one hundred thirteen million, two hundred three thousand, two hundred twelve".