213112612 has 24 divisors (see below), whose sum is σ = 399893760. Its totient is φ = 99016320.

The previous prime is 213112597. The next prime is 213112639. The reversal of 213112612 is 216211312.

213112612 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 213112612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14464 + ... + 25207.

It is an arithmetic number, because the mean of its divisors is an integer number (16662240).

Almost surely, 2^213112612 is an apocalyptic number.

It is an amenable number.

213112612 is a deficient number, since it is larger than the sum of its proper divisors (186781148).

213112612 is a wasteful number, since it uses less digits than its factorization.

213112612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39771 (or 39769 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

The square root of 213112612 is about 14598.3770330815. The cubic root of 213112612 is about 597.3144905911.

Adding to 213112612 its reverse (216211312), we get a palindrome (429323924).

The spelling of 213112612 in words is "two hundred thirteen million, one hundred twelve thousand, six hundred twelve".