212117060 has 24 divisors (see below), whose sum is σ = 445746840. Its totient is φ = 84789504.

The previous prime is 212117053. The next prime is 212117111. The reversal of 212117060 is 60711212.

It can be written as a sum of positive squares in 4 ways, for example, as 119071744 + 93045316 = 10912^2 + 9646^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39242 + ... + 44318.

It is an arithmetic number, because the mean of its divisors is an integer number (18572785).

Almost surely, 2^212117060 is an apocalyptic number.

212117060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212117060 is an abundant number, since it is smaller than the sum of its proper divisors (233629780).

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

212117060 is a wasteful number, since it uses less digits than its factorization.

212117060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7175 (or 7173 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 212117060 is about 14564.2390807072. The cubic root of 212117060 is about 596.3829236001.

Adding to 212117060 its reverse (60711212), we get a palindrome (272828272).

The spelling of 212117060 in words is "two hundred twelve million, one hundred seventeen thousand, sixty".