2104523021 has 2 divisors, whose sum is σ = 2104523022. Its totient is φ = 2104523020.

The previous prime is 2104522943. The next prime is 2104523027. The reversal of 2104523021 is 1203254012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2104515625 + 7396 = 45875^2 + 86^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2104523021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2104522984 and 2104523002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2104523027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052261510 + 1052261511.

It is an arithmetic number, because the mean of its divisors is an integer number (1052261511).

Almost surely, 2^2104523021 is an apocalyptic number.

It is an amenable number.

2104523021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2104523021 is an equidigital number, since it uses as much as digits as its factorization.

2104523021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2104523021 is about 45875.0806102834. The cubic root of 2104523021 is about 1281.4978845199.

Adding to 2104523021 its reverse (1203254012), we get a palindrome (3307777033).

The spelling of 2104523021 in words is "two billion, one hundred four million, five hundred twenty-three thousand, twenty-one".