111011200121 has 2 divisors, whose sum is σ = 111011200122. Its totient is φ = 111011200120.

The previous prime is 111011200067. The next prime is 111011200129. The reversal of 111011200121 is 121002110111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83990415721 + 27020784400 = 289811^2 + 164380^2 .

It is a cyclic number.

It is not a de Polignac number, because 111011200121 - 2²² = 111007005817 is a prime.

It is not a weakly prime, because it can be changed into another prime (111011200129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505600060 + 55505600061.

It is an arithmetic number, because the mean of its divisors is an integer number (55505600061).

Almost surely, 2^111011200121 is an apocalyptic number.

It is an amenable number.

111011200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111011200121 is an equidigital number, since it uses as much as digits as its factorization.

111011200121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111011200121 its reverse (121002110111), we get a palindrome (232013310232).

The spelling of 111011200121 in words is "one hundred eleven billion, eleven million, two hundred thousand, one hundred twenty-one".