102012218 has 48 divisors (see below), whose sum is σ = 195662304. Its totient is φ = 39443040.

The previous prime is 102012217. The next prime is 102012221. The reversal of 102012218 is 812210201.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102012196 and 102012205.

It is not an unprimeable number, because it can be changed into a prime (102012217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186221 + ... + 186767.

It is an arithmetic number, because the mean of its divisors is an integer number (4076298).

Almost surely, 2^102012218 is an apocalyptic number.

102012218 is a deficient number, since it is larger than the sum of its proper divisors (93650086).

102012218 is a wasteful number, since it uses less digits than its factorization.

102012218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 740 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 102012218 is about 10100.1098013833. The cubic root of 102012218 is about 467.2515278137.

Adding to 102012218 its reverse (812210201), we get a palindrome (914222419).

The spelling of 102012218 in words is "one hundred two million, twelve thousand, two hundred eighteen".