2123521843 has 2 divisors, whose sum is σ = 2123521844. Its totient is φ = 2123521842.

The previous prime is 2123521837. The next prime is 2123521849. The reversal of 2123521843 is 3481253212.

It is a balanced prime because it is at equal distance from previous prime (2123521837) and next prime (2123521849).

It is a cyclic number.

It is not a de Polignac number, because 2123521843 - 2⁵ = 2123521811 is a prime.

It is not a weakly prime, because it can be changed into another prime (2123521849) 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 as a sum of consecutive naturals, namely, 1061760921 + 1061760922.

It is an arithmetic number, because the mean of its divisors is an integer number (1061760922).

Almost surely, 2^2123521843 is an apocalyptic number.

2123521843 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123521843 is an equidigital number, since it uses as much as digits as its factorization.

2123521843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 2123521843 is about 46081.6866336292. The cubic root of 2123521843 is about 1285.3426275255.

The spelling of 2123521843 in words is "two billion, one hundred twenty-three million, five hundred twenty-one thousand, eight hundred forty-three".