111200201021009 has 2 divisors, whose sum is σ = 111200201021010. Its totient is φ = 111200201021008.

The previous prime is 111200201020999. The next prime is 111200201021081. The reversal of 111200201021009 is 900120102002111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70319880633025 + 40880320387984 = 8385695^2 + 6393772^2 .

It is an emirp because it is prime and its reverse (900120102002111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111200201021009 - 2²⁴ = 111200184243793 is a prime.

It is a super-2 number, since 2×111200201021009² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111200201021099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600100510504 + 55600100510505.

It is an arithmetic number, because the mean of its divisors is an integer number (55600100510505).

Almost surely, 2^{111200201021009} is an apocalyptic number.

It is an amenable number.

111200201021009 is a deficient number, since it is larger than the sum of its proper divisors (1).

111200201021009 is an equidigital number, since it uses as much as digits as its factorization.

111200201021009 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 111200201021009 in words is "one hundred eleven trillion, two hundred billion, two hundred one million, twenty-one thousand, nine".