111201020129 has 2 divisors, whose sum is σ = 111201020130. Its totient is φ = 111201020128.

The previous prime is 111201020081. The next prime is 111201020167. The reversal of 111201020129 is 921020102111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57015888400 + 54185131729 = 238780^2 + 232777^2 .

It is a cyclic number.

It is not a de Polignac number, because 111201020129 - 2¹² = 111201016033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111201020129.

It is not a weakly prime, because it can be changed into another prime (111201020179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600510064 + 55600510065.

It is an arithmetic number, because the mean of its divisors is an integer number (55600510065).

Almost surely, 2^111201020129 is an apocalyptic number.

It is an amenable number.

111201020129 is a deficient number, since it is larger than the sum of its proper divisors (1).

111201020129 is an equidigital number, since it uses as much as digits as its factorization.

111201020129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 111201020129 in words is "one hundred eleven billion, two hundred one million, twenty thousand, one hundred twenty-nine".