1241115543221 has 2 divisors, whose sum is σ = 1241115543222. Its totient is φ = 1241115543220.

The previous prime is 1241115543209. The next prime is 1241115543223. The reversal of 1241115543221 is 1223455111421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 976369276996 + 264746266225 = 988114^2 + 514535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1241115543221 - 2¹⁰ = 1241115542197 is a prime.

Together with 1241115543223, 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 (1241115543223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620557771610 + 620557771611.

It is an arithmetic number, because the mean of its divisors is an integer number (620557771611).

Almost surely, 2^{1241115543221} is an apocalyptic number.

It is an amenable number.

1241115543221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241115543221 is an equidigital number, since it uses as much as digits as its factorization.

1241115543221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 32.

The spelling of 1241115543221 in words is "one trillion, two hundred forty-one billion, one hundred fifteen million, five hundred forty-three thousand, two hundred twenty-one".