13212231491 has 2 divisors, whose sum is σ = 13212231492. Its totient is φ = 13212231490.

The previous prime is 13212231467. The next prime is 13212231559. The reversal of 13212231491 is 19413221231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13212231491 - 2¹⁰ = 13212230467 is a prime.

It is not a weakly prime, because it can be changed into another prime (13212231401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6606115745 + 6606115746.

It is an arithmetic number, because the mean of its divisors is an integer number (6606115746).

Almost surely, 2^13212231491 is an apocalyptic number.

13212231491 is a deficient number, since it is larger than the sum of its proper divisors (1).

13212231491 is an equidigital number, since it uses as much as digits as its factorization.

13212231491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The spelling of 13212231491 in words is "thirteen billion, two hundred twelve million, two hundred thirty-one thousand, four hundred ninety-one".