1203321221279 has 2 divisors, whose sum is σ = 1203321221280. Its totient is φ = 1203321221278.

The previous prime is 1203321221273. The next prime is 1203321221371. The reversal of 1203321221279 is 9721221233021.

It is a weak prime.

It is an emirp because it is prime and its reverse (9721221233021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1203321221279 - 2⁸ = 1203321221023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203321221273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601660610639 + 601660610640.

It is an arithmetic number, because the mean of its divisors is an integer number (601660610640).

Almost surely, 2^{1203321221279} is an apocalyptic number.

1203321221279 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203321221279 is an equidigital number, since it uses as much as digits as its factorization.

1203321221279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 1203321221279 in words is "one trillion, two hundred three billion, three hundred twenty-one million, two hundred twenty-one thousand, two hundred seventy-nine".