2011129591 has 16 divisors (see below), whose sum is σ = 2142878976. Its totient is φ = 1883491456.

The previous prime is 2011129583. The next prime is 2011129609. The reversal of 2011129591 is 1959211102.

It is a cyclic number.

It is not a de Polignac number, because 2011129591 - 2³ = 2011129583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011129531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211056 + ... + 220378.

It is an arithmetic number, because the mean of its divisors is an integer number (133929936).

Almost surely, 2^2011129591 is an apocalyptic number.

2011129591 is a deficient number, since it is larger than the sum of its proper divisors (131749385).

2011129591 is a wasteful number, since it uses less digits than its factorization.

2011129591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9542.

The product of its (nonzero) digits is 1620, while the sum is 31.

The square root of 2011129591 is about 44845.6195296709. The cubic root of 2011129591 is about 1262.2537958093.

The spelling of 2011129591 in words is "two billion, eleven million, one hundred twenty-nine thousand, five hundred ninety-one".