1010101091 has 2 divisors, whose sum is σ = 1010101092. Its totient is φ = 1010101090.

The previous prime is 1010101069. The next prime is 1010101093. The reversal of 1010101091 is 1901010101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1010101091 - 2²² = 1005906787 is a prime.

Together with 1010101093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1010101093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505050545 + 505050546.

It is an arithmetic number, because the mean of its divisors is an integer number (505050546).

Almost surely, 2^1010101091 is an apocalyptic number.

1010101091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010101091 is an equidigital number, since it uses as much as digits as its factorization.

1010101091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9, while the sum is 14.

The square root of 1010101091 is about 31782.0875809000. The cubic root of 1010101091 is about 1003.3557566342.

Adding to 1010101091 its reverse (1901010101), we get a palindrome (2911111192).

The spelling of 1010101091 in words is "one billion, ten million, one hundred one thousand, ninety-one".