1061110000091 has 2 divisors, whose sum is σ = 1061110000092. Its totient is φ = 1061110000090.

The previous prime is 1061110000043. The next prime is 1061110000109. The reversal of 1061110000091 is 1900000111601.

Together with next prime (1061110000109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1061110000091 - 2¹⁴ = 1061109983707 is a prime.

It is a super-2 number, since 2×1061110000091² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1061110000021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530555000045 + 530555000046.

It is an arithmetic number, because the mean of its divisors is an integer number (530555000046).

Almost surely, 2^{1061110000091} is an apocalyptic number.

1061110000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061110000091 is an equidigital number, since it uses as much as digits as its factorization.

1061110000091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 20.

Adding to 1061110000091 its reverse (1900000111601), we get a palindrome (2961110111692).

The spelling of 1061110000091 in words is "one trillion, sixty-one billion, one hundred ten million, ninety-one", and thus it is an aban number.