2113231009 has 2 divisors, whose sum is σ = 2113231010. Its totient is φ = 2113231008.

The previous prime is 2113230983. The next prime is 2113231027. The reversal of 2113231009 is 9001323112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1776875409 + 336355600 = 42153^2 + 18340^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113231009 - 2¹¹ = 2113228961 is a prime.

It is not a weakly prime, because it can be changed into another prime (2113238009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056615504 + 1056615505.

It is an arithmetic number, because the mean of its divisors is an integer number (1056615505).

Almost surely, 2^2113231009 is an apocalyptic number.

It is an amenable number.

2113231009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113231009 is an equidigital number, since it uses as much as digits as its factorization.

2113231009 is an evil number, because the sum of its binary digits is even.

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

The square root of 2113231009 is about 45969.8924188430. The cubic root of 2113231009 is about 1283.2629578020.

The spelling of 2113231009 in words is "two billion, one hundred thirteen million, two hundred thirty-one thousand, nine".