12261211313 has 4 divisors (see below), whose sum is σ = 13204381428. Its totient is φ = 11318041200.

The previous prime is 12261211301. The next prime is 12261211337. The reversal of 12261211313 is 31311216221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 827827984 + 11433383329 = 28772^2 + 106927^2 .

It is a cyclic number.

It is not a de Polignac number, because 12261211313 - 2¹⁴ = 12261194929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12261211343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471585038 + ... + 471585063.

It is an arithmetic number, because the mean of its divisors is an integer number (3301095357).

Almost surely, 2^12261211313 is an apocalyptic number.

12261211313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12261211313 is a deficient number, since it is larger than the sum of its proper divisors (943170115).

12261211313 is an equidigital number, since it uses as much as digits as its factorization.

12261211313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943170114.

The product of its digits is 432, while the sum is 23.

Adding to 12261211313 its reverse (31311216221), we get a palindrome (43572427534).

The spelling of 12261211313 in words is "twelve billion, two hundred sixty-one million, two hundred eleven thousand, three hundred thirteen".