223211203212 has 12 divisors (see below), whose sum is σ = 520826140856. Its totient is φ = 74403734400.

The previous prime is 223211203199. The next prime is 223211203231. The reversal of 223211203212 is 212302112322.

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

It is a super-3 number, since 3×223211203212³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9300466789 + ... + 9300466812.

Almost surely, 2^223211203212 is an apocalyptic number.

It is an amenable number.

223211203212 is an abundant number, since it is smaller than the sum of its proper divisors (297614937644).

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

223211203212 is a wasteful number, since it uses less digits than its factorization.

223211203212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18600933608 (or 18600933606 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 223211203212 its reverse (212302112322), we get a palindrome (435513315534).

The spelling of 223211203212 in words is "two hundred twenty-three billion, two hundred eleven million, two hundred three thousand, two hundred twelve".