1221242311301 has 2 divisors, whose sum is σ = 1221242311302. Its totient is φ = 1221242311300.

The previous prime is 1221242311259. The next prime is 1221242311411. The reversal of 1221242311301 is 1031132421221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1129235649025 + 92006662276 = 1062655^2 + 303326^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221242311301 - 2³⁸ = 946364404357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221242361301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610621155650 + 610621155651.

It is an arithmetic number, because the mean of its divisors is an integer number (610621155651).

Almost surely, 2^{1221242311301} is an apocalyptic number.

It is an amenable number.

1221242311301 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221242311301 is an equidigital number, since it uses as much as digits as its factorization.

1221242311301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 1221242311301 its reverse (1031132421221), we get a palindrome (2252374732522).

The spelling of 1221242311301 in words is "one trillion, two hundred twenty-one billion, two hundred forty-two million, three hundred eleven thousand, three hundred one".