111000201989 has 2 divisors, whose sum is σ = 111000201990. Its totient is φ = 111000201988.

The previous prime is 111000201953. The next prime is 111000202013. The reversal of 111000201989 is 989102000111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109491501025 + 1508700964 = 330895^2 + 38842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111000201989 is a prime.

It is a super-2 number, since 2×111000201989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111000401989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500100994 + 55500100995.

It is an arithmetic number, because the mean of its divisors is an integer number (55500100995).

Almost surely, 2^111000201989 is an apocalyptic number.

It is an amenable number.

111000201989 is a deficient number, since it is larger than the sum of its proper divisors (1).

111000201989 is an equidigital number, since it uses as much as digits as its factorization.

111000201989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 32.

The spelling of 111000201989 in words is "one hundred eleven billion, two hundred one thousand, nine hundred eighty-nine".