1201221101099 has 2 divisors, whose sum is σ = 1201221101100. Its totient is φ = 1201221101098.

The previous prime is 1201221101071. The next prime is 1201221101153. The reversal of 1201221101099 is 9901011221021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1201221101099 - 2²⁰ = 1201220052523 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201221101029) 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, 600610550549 + 600610550550.

It is an arithmetic number, because the mean of its divisors is an integer number (600610550550).

Almost surely, 2^{1201221101099} is an apocalyptic number.

1201221101099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201221101099 is an equidigital number, since it uses as much as digits as its factorization.

1201221101099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 29.

It can be divided in two parts, 120122 and 1101099, that added together give a palindrome (1221221).

The spelling of 1201221101099 in words is "one trillion, two hundred one billion, two hundred twenty-one million, one hundred one thousand, ninety-nine".