1011111121187 has 2 divisors, whose sum is σ = 1011111121188. Its totient is φ = 1011111121186.

The previous prime is 1011111121169. The next prime is 1011111121253. The reversal of 1011111121187 is 7811211111101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1011111121187 - 2⁶ = 1011111121123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011111121147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505555560593 + 505555560594.

It is an arithmetic number, because the mean of its divisors is an integer number (505555560594).

Almost surely, 2^{1011111121187} is an apocalyptic number.

1011111121187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011111121187 is an equidigital number, since it uses as much as digits as its factorization.

1011111121187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 26.

Adding to 1011111121187 its reverse (7811211111101), we get a palindrome (8822322232288).

The spelling of 1011111121187 in words is "one trillion, eleven billion, one hundred eleven million, one hundred twenty-one thousand, one hundred eighty-seven".