213223135212 has 192 divisors, whose sum is σ = 580989337600. Its totient is φ = 67542958080.

The previous prime is 213223135117. The next prime is 213223135241. The reversal of 213223135212 is 212531322312.

213223135212 is a `hidden beast` number, since 2 + 1 + 322 + 313 + 5 + 21 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51044868 + ... + 51049044.

Almost surely, 2^213223135212 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 213223135212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290494668800).

213223135212 is an abundant number, since it is smaller than the sum of its proper divisors (367766202388).

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

213223135212 is a wasteful number, since it uses less digits than its factorization.

213223135212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4493 (or 4485 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

Adding to 213223135212 its reverse (212531322312), we get a palindrome (425754457524).

The spelling of 213223135212 in words is "two hundred thirteen billion, two hundred twenty-three million, one hundred thirty-five thousand, two hundred twelve".