121301113311221 has 2 divisors, whose sum is σ = 121301113311222. Its totient is φ = 121301113311220.

The previous prime is 121301113311211. The next prime is 121301113311229. The reversal of 121301113311221 is 122113311103121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114696367510321 + 6604745800900 = 10709639^2 + 2569970^2 .

It is a cyclic number.

It is not a de Polignac number, because 121301113311221 - 2¹⁰ = 121301113310197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121301113311229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60650556655610 + 60650556655611.

It is an arithmetic number, because the mean of its divisors is an integer number (60650556655611).

Almost surely, 2^{121301113311221} is an apocalyptic number.

It is an amenable number.

121301113311221 is a deficient number, since it is larger than the sum of its proper divisors (1).

121301113311221 is an equidigital number, since it uses as much as digits as its factorization.

121301113311221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

Adding to 121301113311221 its reverse (122113311103121), we get a palindrome (243414424414342).

The spelling of 121301113311221 in words is "one hundred twenty-one trillion, three hundred one billion, one hundred thirteen million, three hundred eleven thousand, two hundred twenty-one".