12201231213 has 6 divisors (see below), whose sum is σ = 17624000654. Its totient is φ = 8134154136.

The previous prime is 12201231173. The next prime is 12201231247. The reversal of 12201231213 is 31213210221.

12201231213 is a `hidden beast` number, since 1 + 220 + 1 + 231 + 213 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12029044329 + 172186884 = 109677^2 + 13122^2 .

It is not a de Polignac number, because 12201231213 - 2¹⁴ = 12201214829 is a prime.

It is a super-2 number, since 2×12201231213² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201231013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 677846170 + ... + 677846187.

Almost surely, 2^12201231213 is an apocalyptic number.

It is an amenable number.

12201231213 is a deficient number, since it is larger than the sum of its proper divisors (5422769441).

12201231213 is a wasteful number, since it uses less digits than its factorization.

12201231213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355692363 (or 1355692360 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12201231213 its reverse (31213210221), we get a palindrome (43414441434).

The spelling of 12201231213 in words is "twelve billion, two hundred one million, two hundred thirty-one thousand, two hundred thirteen".