2123521143 has 16 divisors (see below), whose sum is σ = 2931210720. Its totient is φ = 1365830144.

The previous prime is 2123521139. The next prime is 2123521217. The reversal of 2123521143 is 3411253212.

It is a cyclic number.

It is not a de Polignac number, because 2123521143 - 2² = 2123521139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123521843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116155 + ... + 133187.

It is an arithmetic number, because the mean of its divisors is an integer number (183200670).

Almost surely, 2^2123521143 is an apocalyptic number.

2123521143 is a deficient number, since it is larger than the sum of its proper divisors (807689577).

2123521143 is a wasteful number, since it uses less digits than its factorization.

2123521143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18498.

The product of its digits is 1440, while the sum is 24.

The square root of 2123521143 is about 46081.6790384205. The cubic root of 2123521143 is about 1285.3424862916.

Adding to 2123521143 its reverse (3411253212), we get a palindrome (5534774355).

The spelling of 2123521143 in words is "two billion, one hundred twenty-three million, five hundred twenty-one thousand, one hundred forty-three".