11321221257487 has 2 divisors, whose sum is σ = 11321221257488. Its totient is φ = 11321221257486.

The previous prime is 11321221257473. The next prime is 11321221257491. The reversal of 11321221257487 is 78475212212311.

It is a strong prime.

It is an emirp because it is prime and its reverse (78475212212311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11321221257487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11321221257497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5660610628743 + 5660610628744.

It is an arithmetic number, because the mean of its divisors is an integer number (5660610628744).

Almost surely, 2^{11321221257487} is an apocalyptic number.

11321221257487 is a deficient number, since it is larger than the sum of its proper divisors (1).

11321221257487 is an equidigital number, since it uses as much as digits as its factorization.

11321221257487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 376320, while the sum is 46.

Adding to 11321221257487 its reverse (78475212212311), we get a palindrome (89796433469798).

The spelling of 11321221257487 in words is "eleven trillion, three hundred twenty-one billion, two hundred twenty-one million, two hundred fifty-seven thousand, four hundred eighty-seven".