2101032391 has 4 divisors (see below), whose sum is σ = 2119625712. Its totient is φ = 2082439072.

The previous prime is 2101032389. The next prime is 2101032433. The reversal of 2101032391 is 1932301012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2101032391 - 2¹ = 2101032389 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 (2101032371) 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, 9296491 + ... + 9296716.

It is an arithmetic number, because the mean of its divisors is an integer number (529906428).

Almost surely, 2^2101032391 is an apocalyptic number.

2101032391 is a deficient number, since it is larger than the sum of its proper divisors (18593321).

2101032391 is a wasteful number, since it uses less digits than its factorization.

2101032391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18593320.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 2101032391 is about 45837.0198747693. The cubic root of 2101032391 is about 1280.7889811488.

The spelling of 2101032391 in words is "two billion, one hundred one million, thirty-two thousand, three hundred ninety-one".