1101010101091 has 2 divisors, whose sum is σ = 1101010101092. Its totient is φ = 1101010101090.

The previous prime is 1101010101049. The next prime is 1101010101101. The reversal of 1101010101091 is 1901010101011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1101010101091 - 2¹¹ = 1101010099043 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101010101011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550505050545 + 550505050546.

It is an arithmetic number, because the mean of its divisors is an integer number (550505050546).

Almost surely, 2^{1101010101091} is an apocalyptic number.

1101010101091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101010101091 is an equidigital number, since it uses as much as digits as its factorization.

1101010101091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9, while the sum is 16.

The spelling of 1101010101091 in words is "one trillion, one hundred one billion, ten million, one hundred one thousand, ninety-one".