2103142081 has 2 divisors, whose sum is σ = 2103142082. Its totient is φ = 2103142080.

The previous prime is 2103142073. The next prime is 2103142087. The reversal of 2103142081 is 1802413012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1861059600 + 242082481 = 43140^2 + 15559^2 .

It is a cyclic number.

It is not a de Polignac number, because 2103142081 - 2³ = 2103142073 is a prime.

It is a super-2 number, since 2×2103142081² = 8846413225746021122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2103142087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051571040 + 1051571041.

It is an arithmetic number, because the mean of its divisors is an integer number (1051571041).

Almost surely, 2^2103142081 is an apocalyptic number.

It is an amenable number.

2103142081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2103142081 is an equidigital number, since it uses as much as digits as its factorization.

2103142081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 2103142081 is about 45860.0270497086. The cubic root of 2103142081 is about 1281.2175266297.

Adding to 2103142081 its reverse (1802413012), we get a palindrome (3905555093).

The spelling of 2103142081 in words is "two billion, one hundred three million, one hundred forty-two thousand, eighty-one".