241221511231397 has 2 divisors, whose sum is σ = 241221511231398. Its totient is φ = 241221511231396.

The previous prime is 241221511231391. The next prime is 241221511231427. The reversal of 241221511231397 is 793132115122142.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241216744571716 + 4766659681 = 15531154^2 + 69041^2 .

It is a cyclic number.

It is not a de Polignac number, because 241221511231397 - 2¹⁶ = 241221511165861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (241221511231391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120610755615698 + 120610755615699.

It is an arithmetic number, because the mean of its divisors is an integer number (120610755615699).

Almost surely, 2^{241221511231397} is an apocalyptic number.

It is an amenable number.

241221511231397 is a deficient number, since it is larger than the sum of its proper divisors (1).

241221511231397 is an equidigital number, since it uses as much as digits as its factorization.

241221511231397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The spelling of 241221511231397 in words is "two hundred forty-one trillion, two hundred twenty-one billion, five hundred eleven million, two hundred thirty-one thousand, three hundred ninety-seven".