212112022212 has 18 divisors (see below), whose sum is σ = 536172056238. Its totient is φ = 70704007392.

The previous prime is 212112022193. The next prime is 212112022223. The reversal of 212112022212 is 212220211212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 108488549376 + 103623472836 = 329376^2 + 321906^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2946000273 + ... + 2946000344.

Almost surely, 2^212112022212 is an apocalyptic number.

It is an amenable number.

212112022212 is an abundant number, since it is smaller than the sum of its proper divisors (324060034026).

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

212112022212 is a wasteful number, since it uses less digits than its factorization.

212112022212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5892000627 (or 5892000622 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212112022212 its reverse (212220211212), we get a palindrome (424332233424).

The spelling of 212112022212 in words is "two hundred twelve billion, one hundred twelve million, twenty-two thousand, two hundred twelve".