1201021100243 has 2 divisors, whose sum is σ = 1201021100244. Its totient is φ = 1201021100242.

The previous prime is 1201021100197. The next prime is 1201021100263. The reversal of 1201021100243 is 3420011201021.

It is a strong prime.

It is an emirp because it is prime and its reverse (3420011201021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1201021100243 - 2¹⁸ = 1201020838099 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201021100263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600510550121 + 600510550122.

It is an arithmetic number, because the mean of its divisors is an integer number (600510550122).

Almost surely, 2^{1201021100243} is an apocalyptic number.

1201021100243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201021100243 is an equidigital number, since it uses as much as digits as its factorization.

1201021100243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1201021100243 its reverse (3420011201021), we get a palindrome (4621032301264).

The spelling of 1201021100243 in words is "one trillion, two hundred one billion, twenty-one million, one hundred thousand, two hundred forty-three".