111202220200121 has 2 divisors, whose sum is σ = 111202220200122. Its totient is φ = 111202220200120.

The previous prime is 111202220200117. The next prime is 111202220200177. The reversal of 111202220200121 is 121002022202111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109961669760121 + 1240550440000 = 10486261^2 + 1113800^2 .

It is a cyclic number.

It is not a de Polignac number, because 111202220200121 - 2² = 111202220200117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111202220200121.

It is not a weakly prime, because it can be changed into another prime (111202220200111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55601110100060 + 55601110100061.

It is an arithmetic number, because the mean of its divisors is an integer number (55601110100061).

Almost surely, 2^{111202220200121} is an apocalyptic number.

It is an amenable number.

111202220200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111202220200121 is an equidigital number, since it uses as much as digits as its factorization.

111202220200121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111202220200121 its reverse (121002022202111), we get a palindrome (232204242402232).

The spelling of 111202220200121 in words is "one hundred eleven trillion, two hundred two billion, two hundred twenty million, two hundred thousand, one hundred twenty-one".