212112670 has 192 divisors, whose sum is σ = 531878400. Its totient is φ = 60023040.

The previous prime is 212112661. The next prime is 212112671. The reversal of 212112670 is 76211212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3595101 + ... + 3595159.

It is an arithmetic number, because the mean of its divisors is an integer number (2770200).

Almost surely, 2^212112670 is an apocalyptic number.

212112670 is an abundant number, since it is smaller than the sum of its proper divisors (319765730).

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

212112670 is a wasteful number, since it uses less digits than its factorization.

212112670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 212112670 is about 14564.0883683120. The cubic root of 212112670 is about 596.3788093009.

Adding to 212112670 its reverse (76211212), we get a palindrome (288323882).

The spelling of 212112670 in words is "two hundred twelve million, one hundred twelve thousand, six hundred seventy".