2123235571 has 2 divisors, whose sum is σ = 2123235572. Its totient is φ = 2123235570.

The previous prime is 2123235487. The next prime is 2123235589. The reversal of 2123235571 is 1755323212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123235571 is a prime.

It is not a weakly prime, because it can be changed into another prime (2123235971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061617785 + 1061617786.

It is an arithmetic number, because the mean of its divisors is an integer number (1061617786).

Almost surely, 2^2123235571 is an apocalyptic number.

2123235571 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123235571 is an equidigital number, since it uses as much as digits as its factorization.

2123235571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 31.

The square root of 2123235571 is about 46078.5803926293. The cubic root of 2123235571 is about 1285.2848659125.

Adding to 2123235571 its reverse (1755323212), we get a palindrome (3878558783).

The spelling of 2123235571 in words is "two billion, one hundred twenty-three million, two hundred thirty-five thousand, five hundred seventy-one".