2102131181 has 2 divisors, whose sum is σ = 2102131182. Its totient is φ = 2102131180.

The previous prime is 2102131169. The next prime is 2102131211. The reversal of 2102131181 is 1811312012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2082461956 + 19669225 = 45634^2 + 4435^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102131181 - 2²⁶ = 2035022317 is a prime.

It is a super-2 number, since 2×2102131181² = 8837911004264909522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102131121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051065590 + 1051065591.

It is an arithmetic number, because the mean of its divisors is an integer number (1051065591).

Almost surely, 2^2102131181 is an apocalyptic number.

It is an amenable number.

2102131181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102131181 is an equidigital number, since it uses as much as digits as its factorization.

2102131181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 20.

The square root of 2102131181 is about 45849.0041440379. The cubic root of 2102131181 is about 1281.0122163022.

Adding to 2102131181 its reverse (1811312012), we get a palindrome (3913443193).

The spelling of 2102131181 in words is "two billion, one hundred two million, one hundred thirty-one thousand, one hundred eighty-one".