1321011220339 has 2 divisors, whose sum is σ = 1321011220340. Its totient is φ = 1321011220338.

The previous prime is 1321011220231. The next prime is 1321011220357. The reversal of 1321011220339 is 9330221101231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321011220339 - 2¹⁷ = 1321011089267 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321011020339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660505610169 + 660505610170.

It is an arithmetic number, because the mean of its divisors is an integer number (660505610170).

Almost surely, 2^{1321011220339} is an apocalyptic number.

1321011220339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321011220339 is an equidigital number, since it uses as much as digits as its factorization.

1321011220339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 1321011220339 in words is "one trillion, three hundred twenty-one billion, eleven million, two hundred twenty thousand, three hundred thirty-nine".