212666212 has 36 divisors (see below), whose sum is σ = 413755020. Its totient is φ = 95560960.

The previous prime is 212666203. The next prime is 212666227.

212666212 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 65189476 + 147476736 = 8074^2 + 12144^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 40608 + ... + 45544.

It is an arithmetic number, because the mean of its divisors is an integer number (11493195).

Almost surely, 2^212666212 is an apocalyptic number.

212666212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212666212 is a deficient number, since it is larger than the sum of its proper divisors (201088808).

212666212 is a wasteful number, since it uses less digits than its factorization.

212666212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5052 (or 5039 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 212666212 is about 14583.0796473173. The cubic root of 212666212 is about 596.8971406935.

It can be divided in two parts, 212666 and 212, that added together give a triangular number (212878 = T₆₅₂).

The spelling of 212666212 in words is "two hundred twelve million, six hundred sixty-six thousand, two hundred twelve".