12102321018 has 64 divisors (see below), whose sum is σ = 25064911872. Its totient is φ = 3893218560.

The previous prime is 12102321013. The next prime is 12102321037. The reversal of 12102321018 is 81012320121.

It is a junction number, because it is equal to n+sod(n) for n = 12102320985 and 12102321003.

It is not an unprimeable number, because it can be changed into a prime (12102321013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16646571 + ... + 16647297.

It is an arithmetic number, because the mean of its divisors is an integer number (391639248).

Almost surely, 2^12102321018 is an apocalyptic number.

12102321018 is an abundant number, since it is smaller than the sum of its proper divisors (12962590854).

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

12102321018 is a wasteful number, since it uses less digits than its factorization.

12102321018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459.

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

Adding to 12102321018 its reverse (81012320121), we get a palindrome (93114641139).

The spelling of 12102321018 in words is "twelve billion, one hundred two million, three hundred twenty-one thousand, eighteen".