111001011201989 has 2 divisors, whose sum is σ = 111001011201990. Its totient is φ = 111001011201988.

The previous prime is 111001011201937. The next prime is 111001011202019. The reversal of 111001011201989 is 989102110100111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55980473640100 + 55020537561889 = 7482010^2 + 7417583^2 .

It is a cyclic number.

It is not a de Polignac number, because 111001011201989 - 2¹⁶ = 111001011136453 is a prime.

It is a super-2 number, since 2×111001011201989² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111001011261989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500505600994 + 55500505600995.

It is an arithmetic number, because the mean of its divisors is an integer number (55500505600995).

Almost surely, 2^{111001011201989} is an apocalyptic number.

It is an amenable number.

111001011201989 is a deficient number, since it is larger than the sum of its proper divisors (1).

111001011201989 is an equidigital number, since it uses as much as digits as its factorization.

111001011201989 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 35.

The spelling of 111001011201989 in words is "one hundred eleven trillion, one billion, eleven million, two hundred one thousand, nine hundred eighty-nine".