2123121143 has 24 divisors (see below), whose sum is σ = 2655570096. Its totient is φ = 1676812800.

The previous prime is 2123121139. The next prime is 2123121157. The reversal of 2123121143 is 3411213212.

It is not a de Polignac number, because 2123121143 - 2² = 2123121139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123121443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1988 + ... + 65193.

It is an arithmetic number, because the mean of its divisors is an integer number (110648754).

Almost surely, 2^2123121143 is an apocalyptic number.

2123121143 is a deficient number, since it is larger than the sum of its proper divisors (532448953).

2123121143 is a wasteful number, since it uses less digits than its factorization.

2123121143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67235 (or 67222 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 2123121143 is about 46077.3387143832. The cubic root of 2123121143 is about 1285.2617761180.

Adding to 2123121143 its reverse (3411213212), we get a palindrome (5534334355).

It can be divided in two parts, 2123121 and 143, that multiplied together give a palindrome (303606303).

The spelling of 2123121143 in words is "two billion, one hundred twenty-three million, one hundred twenty-one thousand, one hundred forty-three".