1112121101989 has 2 divisors, whose sum is σ = 1112121101990. Its totient is φ = 1112121101988.

The previous prime is 1112121101983. The next prime is 1112121102011. The reversal of 1112121101989 is 9891011212111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 612201399489 + 499919702500 = 782433^2 + 707050^2 .

It is an emirp because it is prime and its reverse (9891011212111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1112121101989 is a prime.

It is a super-2 number, since 2×1112121101989² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1112121101983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556060550994 + 556060550995.

It is an arithmetic number, because the mean of its divisors is an integer number (556060550995).

Almost surely, 2^{1112121101989} is an apocalyptic number.

It is an amenable number.

1112121101989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112121101989 is an equidigital number, since it uses as much as digits as its factorization.

1112121101989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 37.

The spelling of 1112121101989 in words is "one trillion, one hundred twelve billion, one hundred twenty-one million, one hundred one thousand, nine hundred eighty-nine".