2171021143 has 2 divisors, whose sum is σ = 2171021144. Its totient is φ = 2171021142.

The previous prime is 2171021131. The next prime is 2171021147. The reversal of 2171021143 is 3411201712.

It is a happy number.

2171021143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2171021143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2171021147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085510571 + 1085510572.

It is an arithmetic number, because the mean of its divisors is an integer number (1085510572).

Almost surely, 2^2171021143 is an apocalyptic number.

2171021143 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171021143 is an equidigital number, since it uses as much as digits as its factorization.

2171021143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 2171021143 is about 46594.2179138142. The cubic root of 2171021143 is about 1294.8556346376.

Adding to 2171021143 its reverse (3411201712), we get a palindrome (5582222855).

The spelling of 2171021143 in words is "two billion, one hundred seventy-one million, twenty-one thousand, one hundred forty-three".