1200121212247 has 2 divisors, whose sum is σ = 1200121212248. Its totient is φ = 1200121212246.

The previous prime is 1200121212203. The next prime is 1200121212263. The reversal of 1200121212247 is 7422121210021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1200121212247 - 2¹⁹ = 1200120687959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200121212547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600060606123 + 600060606124.

It is an arithmetic number, because the mean of its divisors is an integer number (600060606124).

Almost surely, 2^{1200121212247} is an apocalyptic number.

1200121212247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200121212247 is an equidigital number, since it uses as much as digits as its factorization.

1200121212247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

Adding to 1200121212247 its reverse (7422121210021), we get a palindrome (8622242422268).

The spelling of 1200121212247 in words is "one trillion, two hundred billion, one hundred twenty-one million, two hundred twelve thousand, two hundred forty-seven".