1320208203929 has 2 divisors, whose sum is σ = 1320208203930. Its totient is φ = 1320208203928.

The previous prime is 1320208203869. The next prime is 1320208203959. The reversal of 1320208203929 is 9293028020231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1174951938304 + 145256265625 = 1083952^2 + 381125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320208203929 - 2⁸ = 1320208203673 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320208203959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660104101964 + 660104101965.

It is an arithmetic number, because the mean of its divisors is an integer number (660104101965).

Almost surely, 2^{1320208203929} is an apocalyptic number.

It is an amenable number.

1320208203929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320208203929 is an equidigital number, since it uses as much as digits as its factorization.

1320208203929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 1320208203929 in words is "one trillion, three hundred twenty billion, two hundred eight million, two hundred three thousand, nine hundred twenty-nine".