12694321511 has 2 divisors, whose sum is σ = 12694321512. Its totient is φ = 12694321510.

The previous prime is 12694321441. The next prime is 12694321567. The reversal of 12694321511 is 11512349621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12694321511 - 2¹⁰ = 12694320487 is a prime.

It is a super-2 number, since 2×12694321511² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12694321571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6347160755 + 6347160756.

It is an arithmetic number, because the mean of its divisors is an integer number (6347160756).

Almost surely, 2^12694321511 is an apocalyptic number.

12694321511 is a deficient number, since it is larger than the sum of its proper divisors (1).

12694321511 is an equidigital number, since it uses as much as digits as its factorization.

12694321511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 35.

The spelling of 12694321511 in words is "twelve billion, six hundred ninety-four million, three hundred twenty-one thousand, five hundred eleven".