13323121321987 has 2 divisors, whose sum is σ = 13323121321988. Its totient is φ = 13323121321986.

The previous prime is 13323121321981. The next prime is 13323121322023. The reversal of 13323121321987 is 78912312132331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13323121321987 - 2⁷ = 13323121321859 is a prime.

It is not a weakly prime, because it can be changed into another prime (13323121321981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6661560660993 + 6661560660994.

It is an arithmetic number, because the mean of its divisors is an integer number (6661560660994).

Almost surely, 2^{13323121321987} is an apocalyptic number.

13323121321987 is a deficient number, since it is larger than the sum of its proper divisors (1).

13323121321987 is an equidigital number, since it uses as much as digits as its factorization.

13323121321987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The spelling of 13323121321987 in words is "thirteen trillion, three hundred twenty-three billion, one hundred twenty-one million, three hundred twenty-one thousand, nine hundred eighty-seven".