2107521091 has 6 divisors (see below), whose sum is σ = 2282108820. Its totient is φ = 1945403928.

The previous prime is 2107521083. The next prime is 2107521109. The reversal of 2107521091 is 1901257012.

It is not a de Polignac number, because 2107521091 - 2³ = 2107521083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2107521191) 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 in 5 ways as a sum of consecutive naturals, for example, 6235101 + ... + 6235438.

It is an arithmetic number, because the mean of its divisors is an integer number (380351470).

Almost surely, 2^2107521091 is an apocalyptic number.

2107521091 is a deficient number, since it is larger than the sum of its proper divisors (174587729).

2107521091 is a wasteful number, since it uses less digits than its factorization.

2107521091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12470565 (or 12470552 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 2107521091 is about 45907.7454358194. The cubic root of 2107521091 is about 1282.1061296092.

The spelling of 2107521091 in words is "two billion, one hundred seven million, five hundred twenty-one thousand, ninety-one".