2142103181 has 2 divisors, whose sum is σ = 2142103182. Its totient is φ = 2142103180.

The previous prime is 2142103169. The next prime is 2142103199. The reversal of 2142103181 is 1813012412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2140912900 + 1190281 = 46270^2 + 1091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142103181 is a prime.

It is a super-2 number, since 2×2142103181² = 9177212076100637522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2142103121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071051590 + 1071051591.

It is an arithmetic number, because the mean of its divisors is an integer number (1071051591).

Almost surely, 2^2142103181 is an apocalyptic number.

It is an amenable number.

2142103181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142103181 is an equidigital number, since it uses as much as digits as its factorization.

2142103181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 2142103181 is about 46282.8605533409. The cubic root of 2142103181 is about 1289.0807667140.

Adding to 2142103181 its reverse (1813012412), we get a palindrome (3955115593).

The spelling of 2142103181 in words is "two billion, one hundred forty-two million, one hundred three thousand, one hundred eighty-one".