1101201091 has 2 divisors, whose sum is σ = 1101201092. Its totient is φ = 1101201090.

The previous prime is 1101201077. The next prime is 1101201109. The reversal of 1101201091 is 1901021011.

Together with next prime (1101201109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1901021011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1101201091 - 2⁹ = 1101200579 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101201071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550600545 + 550600546.

It is an arithmetic number, because the mean of its divisors is an integer number (550600546).

Almost surely, 2^1101201091 is an apocalyptic number.

1101201091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101201091 is an equidigital number, since it uses as much as digits as its factorization.

1101201091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 1101201091 is about 33184.3500915718. The cubic root of 1101201091 is about 1032.6556946566.

The spelling of 1101201091 in words is "one billion, one hundred one million, two hundred one thousand, ninety-one".