1321322101087 has 2 divisors, whose sum is σ = 1321322101088. Its totient is φ = 1321322101086.

The previous prime is 1321322101049. The next prime is 1321322101193. The reversal of 1321322101087 is 7801012231231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321322101087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321322101387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660661050543 + 660661050544.

It is an arithmetic number, because the mean of its divisors is an integer number (660661050544).

Almost surely, 2^{1321322101087} is an apocalyptic number.

1321322101087 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321322101087 is an equidigital number, since it uses as much as digits as its factorization.

1321322101087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 1321322101087 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-two million, one hundred one thousand, eighty-seven".