12621615191 has 2 divisors, whose sum is σ = 12621615192. Its totient is φ = 12621615190.

The previous prime is 12621615169. The next prime is 12621615211. The reversal of 12621615191 is 19151612621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12621615191 - 2¹⁴ = 12621598807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12621615131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6310807595 + 6310807596.

It is an arithmetic number, because the mean of its divisors is an integer number (6310807596).

Almost surely, 2^12621615191 is an apocalyptic number.

12621615191 is a deficient number, since it is larger than the sum of its proper divisors (1).

12621615191 is an equidigital number, since it uses as much as digits as its factorization.

12621615191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 35.

The spelling of 12621615191 in words is "twelve billion, six hundred twenty-one million, six hundred fifteen thousand, one hundred ninety-one".