1211243300101 has 2 divisors, whose sum is σ = 1211243300102. Its totient is φ = 1211243300100.

The previous prime is 1211243300039. The next prime is 1211243300143. The reversal of 1211243300101 is 1010033421121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 783986284900 + 427257015201 = 885430^2 + 653649^2 .

It is an emirp because it is prime and its reverse (1010033421121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211243300101 - 2²⁹ = 1210706429189 is a prime.

It is a super-2 number, since 2×1211243300101² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211243300171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605621650050 + 605621650051.

It is an arithmetic number, because the mean of its divisors is an integer number (605621650051).

Almost surely, 2^{1211243300101} is an apocalyptic number.

It is an amenable number.

1211243300101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211243300101 is an equidigital number, since it uses as much as digits as its factorization.

1211243300101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1211243300101 its reverse (1010033421121), we get a palindrome (2221276721222).

The spelling of 1211243300101 in words is "one trillion, two hundred eleven billion, two hundred forty-three million, three hundred thousand, one hundred one".