12261136819 has 2 divisors, whose sum is σ = 12261136820. Its totient is φ = 12261136818.

The previous prime is 12261136807. The next prime is 12261136843. The reversal of 12261136819 is 91863116221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12261136819 - 2⁵ = 12261136787 is a prime.

It is a super-2 number, since 2×12261136819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12261136889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6130568409 + 6130568410.

It is an arithmetic number, because the mean of its divisors is an integer number (6130568410).

Almost surely, 2^12261136819 is an apocalyptic number.

12261136819 is a deficient number, since it is larger than the sum of its proper divisors (1).

12261136819 is an equidigital number, since it uses as much as digits as its factorization.

12261136819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 40.

The spelling of 12261136819 in words is "twelve billion, two hundred sixty-one million, one hundred thirty-six thousand, eight hundred nineteen".