12103212212 has 48 divisors (see below), whose sum is σ = 26131002240. Its totient is φ = 4776596352.

The previous prime is 12103212157. The next prime is 12103212323. The reversal of 12103212212 is 21221230121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112838 + ... + 192194.

It is an arithmetic number, because the mean of its divisors is an integer number (544395880).

Almost surely, 2^12103212212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12103212212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13065501120).

12103212212 is an abundant number, since it is smaller than the sum of its proper divisors (14027790028).

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

12103212212 is a wasteful number, since it uses less digits than its factorization.

12103212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79800 (or 79798 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12103212212 its reverse (21221230121), we get a palindrome (33324442333).

The spelling of 12103212212 in words is "twelve billion, one hundred three million, two hundred twelve thousand, two hundred twelve".