12135443069 has 2 divisors, whose sum is σ = 12135443070. Its totient is φ = 12135443068.

The previous prime is 12135443027. The next prime is 12135443071. The reversal of 12135443069 is 96034453121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7843227844 + 4292215225 = 88562^2 + 65515^2 .

It is a cyclic number.

It is not a de Polignac number, because 12135443069 - 2²⁸ = 11867007613 is a prime.

It is a super-2 number, since 2×12135443069² (a number of 21 digits) contains 22 as substring.

Together with 12135443071, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12135443869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6067721534 + 6067721535.

It is an arithmetic number, because the mean of its divisors is an integer number (6067721535).

Almost surely, 2^12135443069 is an apocalyptic number.

It is an amenable number.

12135443069 is a deficient number, since it is larger than the sum of its proper divisors (1).

12135443069 is an equidigital number, since it uses as much as digits as its factorization.

12135443069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 12135443069 in words is "twelve billion, one hundred thirty-five million, four hundred forty-three thousand, sixty-nine".