11111201220061 has 2 divisors, whose sum is σ = 11111201220062. Its totient is φ = 11111201220060.

The previous prime is 11111201220019. The next prime is 11111201220109. The reversal of 11111201220061 is 16002210211111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10815014927161 + 296186292900 = 3288619^2 + 544230^2 .

It is an emirp because it is prime and its reverse (16002210211111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11111201220061 - 2⁹ = 11111201219549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111201220461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555600610030 + 5555600610031.

It is an arithmetic number, because the mean of its divisors is an integer number (5555600610031).

Almost surely, 2^{11111201220061} is an apocalyptic number.

It is an amenable number.

11111201220061 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111201220061 is an equidigital number, since it uses as much as digits as its factorization.

11111201220061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 11111201220061 its reverse (16002210211111), we get a palindrome (27113411431172).

The spelling of 11111201220061 in words is "eleven trillion, one hundred eleven billion, two hundred one million, two hundred twenty thousand, sixty-one".