12012636541 has 2 divisors, whose sum is σ = 12012636542. Its totient is φ = 12012636540.

The previous prime is 12012636539. The next prime is 12012636583. The reversal of 12012636541 is 14563621021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12011064025 + 1572516 = 109595^2 + 1254^2 .

It is a cyclic number.

It is not a de Polignac number, because 12012636541 - 2¹ = 12012636539 is a prime.

Together with 12012636539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12012636521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006318270 + 6006318271.

It is an arithmetic number, because the mean of its divisors is an integer number (6006318271).

Almost surely, 2^12012636541 is an apocalyptic number.

It is an amenable number.

12012636541 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012636541 is an equidigital number, since it uses as much as digits as its factorization.

12012636541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 12012636541 in words is "twelve billion, twelve million, six hundred thirty-six thousand, five hundred forty-one".