111220201061 has 2 divisors, whose sum is σ = 111220201062. Its totient is φ = 111220201060.

The previous prime is 111220201049. The next prime is 111220201177. The reversal of 111220201061 is 160102022111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70799098561 + 40421102500 = 266081^2 + 201050^2 .

It is a cyclic number.

It is not a de Polignac number, because 111220201061 - 2⁶ = 111220200997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111220201861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610100530 + 55610100531.

It is an arithmetic number, because the mean of its divisors is an integer number (55610100531).

Almost surely, 2^111220201061 is an apocalyptic number.

It is an amenable number.

111220201061 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220201061 is an equidigital number, since it uses as much as digits as its factorization.

111220201061 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 17.

Adding to 111220201061 its reverse (160102022111), we get a palindrome (271322223172).

The spelling of 111220201061 in words is "one hundred eleven billion, two hundred twenty million, two hundred one thousand, sixty-one".