1321927182281 has 2 divisors, whose sum is σ = 1321927182282. Its totient is φ = 1321927182280.

The previous prime is 1321927182259. The next prime is 1321927182299. The reversal of 1321927182281 is 1822817291231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1165138901056 + 156788281225 = 1079416^2 + 395965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321927182281 is a prime.

It is a super-2 number, since 2×1321927182281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1321927112281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660963591140 + 660963591141.

It is an arithmetic number, because the mean of its divisors is an integer number (660963591141).

Almost surely, 2^{1321927182281} is an apocalyptic number.

It is an amenable number.

1321927182281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321927182281 is an equidigital number, since it uses as much as digits as its factorization.

1321927182281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 47.

The spelling of 1321927182281 in words is "one trillion, three hundred twenty-one billion, nine hundred twenty-seven million, one hundred eighty-two thousand, two hundred eighty-one".