213244221312 has 96 divisors (see below), whose sum is σ = 616336442280. Its totient is φ = 70768186368.

The previous prime is 213244221301. The next prime is 213244221313. The reversal of 213244221312 is 213122442312.

213244221312 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 442 + 213 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×213244221312² (a number of 23 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213244221313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146223 + ... + 669230.

Almost surely, 2^213244221312 is an apocalyptic number.

It is an amenable number.

213244221312 is an abundant number, since it is smaller than the sum of its proper divisors (403092220968).

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

213244221312 is a wasteful number, since it uses less digits than its factorization.

213244221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815700 (or 815685 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 213244221312 its reverse (213122442312), we get a palindrome (426366663624).

The spelling of 213244221312 in words is "two hundred thirteen billion, two hundred forty-four million, two hundred twenty-one thousand, three hundred twelve".