12247140991 has 2 divisors, whose sum is σ = 12247140992. Its totient is φ = 12247140990.

The previous prime is 12247140989. The next prime is 12247141009. The reversal of 12247140991 is 19904174221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12247140991 - 2¹ = 12247140989 is a prime.

Together with 12247140989, 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 (12247140911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6123570495 + 6123570496.

It is an arithmetic number, because the mean of its divisors is an integer number (6123570496).

Almost surely, 2^12247140991 is an apocalyptic number.

12247140991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12247140991 is an equidigital number, since it uses as much as digits as its factorization.

12247140991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 12247140991 in words is "twelve billion, two hundred forty-seven million, one hundred forty thousand, nine hundred ninety-one".