2100231181 has 2 divisors, whose sum is σ = 2100231182. Its totient is φ = 2100231180.

The previous prime is 2100231179. The next prime is 2100231193. The reversal of 2100231181 is 1811320012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1958859081 + 141372100 = 44259^2 + 11890^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100231181 - 2¹ = 2100231179 is a prime.

It is a super-2 number, since 2×2100231181² = 8821942027289309522, which contains 22 as substring.

Together with 2100231179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100232181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050115590 + 1050115591.

It is an arithmetic number, because the mean of its divisors is an integer number (1050115591).

Almost surely, 2^2100231181 is an apocalyptic number.

It is an amenable number.

2100231181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100231181 is an equidigital number, since it uses as much as digits as its factorization.

2100231181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 2100231181 is about 45828.2792716462. The cubic root of 2100231181 is about 1280.6261546239.

Adding to 2100231181 its reverse (1811320012), we get a palindrome (3911551193).

The spelling of 2100231181 in words is "two billion, one hundred million, two hundred thirty-one thousand, one hundred eighty-one".