1011111121987 has 8 divisors (see below), whose sum is σ = 1014530353200. Its totient is φ = 1007696096544.

The previous prime is 1011111121981. The next prime is 1011111122027. The reversal of 1011111121987 is 7891211111101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1011111121987 - 2¹¹ = 1011111119939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011111121981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569437 + ... + 1531822.

It is an arithmetic number, because the mean of its divisors is an integer number (126816294150).

Almost surely, 2^{1011111121987} is an apocalyptic number.

1011111121987 is a deficient number, since it is larger than the sum of its proper divisors (3419231213).

1011111121987 is a wasteful number, since it uses less digits than its factorization.

1011111121987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102885.

The product of its (nonzero) digits is 1008, while the sum is 34.

The spelling of 1011111121987 in words is "one trillion, eleven billion, one hundred eleven million, one hundred twenty-one thousand, nine hundred eighty-seven".