213220323012 has 12 divisors (see below), whose sum is σ = 497514087056. Its totient is φ = 71073441000.

The previous prime is 213220322957. The next prime is 213220323013. The reversal of 213220323012 is 210323022312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×213220323012² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213220323012.

It is not an unprimeable number, because it can be changed into a prime (213220323013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8884180114 + ... + 8884180137.

Almost surely, 2^213220323012 is an apocalyptic number.

It is an amenable number.

213220323012 is an abundant number, since it is smaller than the sum of its proper divisors (284293764044).

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

213220323012 is a wasteful number, since it uses less digits than its factorization.

213220323012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17768360258 (or 17768360256 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 213220323012 its reverse (210323022312), we get a palindrome (423543345324).

The spelling of 213220323012 in words is "two hundred thirteen billion, two hundred twenty million, three hundred twenty-three thousand, twelve".