1091009201 has 4 divisors (see below), whose sum is σ = 1116381552. Its totient is φ = 1065636852.

The previous prime is 1091009191. The next prime is 1091009243. The reversal of 1091009201 is 1029001901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1091009201 - 2¹⁴ = 1090992817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091009251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12686111 + ... + 12686196.

It is an arithmetic number, because the mean of its divisors is an integer number (279095388).

Almost surely, 2^1091009201 is an apocalyptic number.

It is an amenable number.

1091009201 is a deficient number, since it is larger than the sum of its proper divisors (25372351).

1091009201 is an equidigital number, since it uses as much as digits as its factorization.

1091009201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25372350.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 1091009201 is about 33030.4284107851. The cubic root of 1091009201 is about 1029.4599868255.

The spelling of 1091009201 in words is "one billion, ninety-one million, nine thousand, two hundred one".