12123132212 has 12 divisors (see below), whose sum is σ = 21425536356. Its totient is φ = 6001550400.

The previous prime is 12123132181. The next prime is 12123132223. The reversal of 12123132212 is 21223132121.

It can be written as a sum of positive squares in 2 ways, for example, as 10388909476 + 1734222736 = 101926^2 + 41644^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15003473 + ... + 15004280.

It is an arithmetic number, because the mean of its divisors is an integer number (1785461363).

Almost surely, 2^12123132212 is an apocalyptic number.

It is an amenable number.

12123132212 is a deficient number, since it is larger than the sum of its proper divisors (9302404144).

12123132212 is a wasteful number, since it uses less digits than its factorization.

12123132212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30007858 (or 30007856 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 12123132212 its reverse (21223132121), we get a palindrome (33346264333).

Subtracting 12123132212 from its reverse (21223132121), we obtain a palindrome (9099999909).

The spelling of 12123132212 in words is "twelve billion, one hundred twenty-three million, one hundred thirty-two thousand, two hundred twelve".