12131522212 has 6 divisors (see below), whose sum is σ = 21230163878. Its totient is φ = 6065761104.

The previous prime is 12131522197. The next prime is 12131522317. The reversal of 12131522212 is 21222513121.

It can be written as a sum of positive squares in only one way, i.e., 11458846116 + 672676096 = 107046^2 + 25936^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1516440273 + ... + 1516440280.

Almost surely, 2^12131522212 is an apocalyptic number.

It is an amenable number.

12131522212 is a deficient number, since it is larger than the sum of its proper divisors (9098641666).

12131522212 is a wasteful number, since it uses less digits than its factorization.

12131522212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032880557 (or 3032880555 counting only the distinct ones).

The product of its digits is 480, while the sum is 22.

Subtracting 12131522212 from its reverse (21222513121), we obtain a palindrome (9090990909).

The spelling of 12131522212 in words is "twelve billion, one hundred thirty-one million, five hundred twenty-two thousand, two hundred twelve".