1201342423289 has 2 divisors, whose sum is σ = 1201342423290. Its totient is φ = 1201342423288.

The previous prime is 1201342423271. The next prime is 1201342423357. The reversal of 1201342423289 is 9823242431021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1060498338025 + 140844085264 = 1029805^2 + 375292^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201342423289 - 2¹⁶ = 1201342357753 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1201342423789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600671211644 + 600671211645.

It is an arithmetic number, because the mean of its divisors is an integer number (600671211645).

Almost surely, 2^{1201342423289} is an apocalyptic number.

It is an amenable number.

1201342423289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201342423289 is an equidigital number, since it uses as much as digits as its factorization.

1201342423289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 1201342423289 in words is "one trillion, two hundred one billion, three hundred forty-two million, four hundred twenty-three thousand, two hundred eighty-nine".