1111212119989 has 2 divisors, whose sum is σ = 1111212119990. Its totient is φ = 1111212119988.

The previous prime is 1111212119909. The next prime is 1111212120001. The reversal of 1111212119989 is 9899112121111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1093164347025 + 18047772964 = 1045545^2 + 134342^2 .

It is an emirp because it is prime and its reverse (9899112121111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111212119989 - 2²³ = 1111203731381 is a prime.

It is a super-2 number, since 2×1111212119989² (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 (1111212119909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555606059994 + 555606059995.

It is an arithmetic number, because the mean of its divisors is an integer number (555606059995).

Almost surely, 2^{1111212119989} is an apocalyptic number.

It is an amenable number.

1111212119989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111212119989 is an equidigital number, since it uses as much as digits as its factorization.

1111212119989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 46.

The spelling of 1111212119989 in words is "one trillion, one hundred eleven billion, two hundred twelve million, one hundred nineteen thousand, nine hundred eighty-nine".