212012330172 has 48 divisors (see below), whose sum is σ = 495892454400. Its totient is φ = 70499875840.

The previous prime is 212012330171. The next prime is 212012330207. The reversal of 212012330172 is 271033210212.

It is a happy number.

It is a super-2 number, since 2×212012330172² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012330171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31271479 + ... + 31278257.

It is an arithmetic number, because the mean of its divisors is an integer number (10331092800).

Almost surely, 2^212012330172 is an apocalyptic number.

It is an amenable number.

212012330172 is an abundant number, since it is smaller than the sum of its proper divisors (283880124228).

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

212012330172 is a wasteful number, since it uses less digits than its factorization.

212012330172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12706 (or 12704 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

Adding to 212012330172 its reverse (271033210212), we get a palindrome (483045540384).

The spelling of 212012330172 in words is "two hundred twelve billion, twelve million, three hundred thirty thousand, one hundred seventy-two".