1201104243221 has 2 divisors, whose sum is σ = 1201104243222. Its totient is φ = 1201104243220.

The previous prime is 1201104243203. The next prime is 1201104243223. The reversal of 1201104243221 is 1223424011021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 779266983121 + 421837260100 = 882761^2 + 649490^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201104243221 - 2¹⁰ = 1201104242197 is a prime.

It is a super-2 number, since 2×1201104243221² (a number of 25 digits) contains 22 as substring.

Together with 1201104243223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201104243223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600552121610 + 600552121611.

It is an arithmetic number, because the mean of its divisors is an integer number (600552121611).

Almost surely, 2^{1201104243221} is an apocalyptic number.

It is an amenable number.

1201104243221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201104243221 is an equidigital number, since it uses as much as digits as its factorization.

1201104243221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1201104243221 its reverse (1223424011021), we get a palindrome (2424528254242).

The spelling of 1201104243221 in words is "one trillion, two hundred one billion, one hundred four million, two hundred forty-three thousand, two hundred twenty-one".