212100618 has 16 divisors (see below), whose sum is σ = 442645056. Its totient is φ = 67626240.

The previous prime is 212100611. The next prime is 212100671. The reversal of 212100618 is 816001212.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212100594 and 212100603.

It is not an unprimeable number, because it can be changed into a prime (212100611) by changing a digit.

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, 768343 + ... + 768618.

It is an arithmetic number, because the mean of its divisors is an integer number (27665316).

Almost surely, 2^212100618 is an apocalyptic number.

212100618 is an abundant number, since it is smaller than the sum of its proper divisors (230544438).

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

212100618 is a wasteful number, since it uses less digits than its factorization.

212100618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536989.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 212100618 is about 14563.6746049889. The cubic root of 212100618 is about 596.3675138991.

The spelling of 212100618 in words is "two hundred twelve million, one hundred thousand, six hundred eighteen".