1011018091 has 2 divisors, whose sum is σ = 1011018092. Its totient is φ = 1011018090.

The previous prime is 1011018079. The next prime is 1011018109. The reversal of 1011018091 is 1908101101.

Together with next prime (1011018109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1011018091 - 2⁵ = 1011018059 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011018011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505509045 + 505509046.

It is an arithmetic number, because the mean of its divisors is an integer number (505509046).

Almost surely, 2^1011018091 is an apocalyptic number.

1011018091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011018091 is an equidigital number, since it uses as much as digits as its factorization.

1011018091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

The square root of 1011018091 is about 31796.5106733428. The cubic root of 1011018091 is about 1003.6592902617.

Adding to 1011018091 its reverse (1908101101), we get a palindrome (2919119192).

The spelling of 1011018091 in words is "one billion, eleven million, eighteen thousand, ninety-one".