13212212491 has 2 divisors, whose sum is σ = 13212212492. Its totient is φ = 13212212490.

The previous prime is 13212212477. The next prime is 13212212509. The reversal of 13212212491 is 19421221231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13212212491 - 2²³ = 13203823883 is a prime.

It is not a weakly prime, because it can be changed into another prime (13212212401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6606106245 + 6606106246.

It is an arithmetic number, because the mean of its divisors is an integer number (6606106246).

Almost surely, 2^13212212491 is an apocalyptic number.

13212212491 is a deficient number, since it is larger than the sum of its proper divisors (1).

13212212491 is an equidigital number, since it uses as much as digits as its factorization.

13212212491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 28.

The spelling of 13212212491 in words is "thirteen billion, two hundred twelve million, two hundred twelve thousand, four hundred ninety-one".