1321221300239 has 2 divisors, whose sum is σ = 1321221300240. Its totient is φ = 1321221300238.

The previous prime is 1321221300169. The next prime is 1321221300247. The reversal of 1321221300239 is 9320031221231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321221300239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321221330239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660610650119 + 660610650120.

It is an arithmetic number, because the mean of its divisors is an integer number (660610650120).

Almost surely, 2^{1321221300239} is an apocalyptic number.

1321221300239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321221300239 is an equidigital number, since it uses as much as digits as its factorization.

1321221300239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 1321221300239 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-one million, three hundred thousand, two hundred thirty-nine".