2106362521 has 2 divisors, whose sum is σ = 2106362522. Its totient is φ = 2106362520.

The previous prime is 2106362519. The next prime is 2106362527. The reversal of 2106362521 is 1252636012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2105433225 + 929296 = 45885^2 + 964^2 .

It is a cyclic number.

It is not a de Polignac number, because 2106362521 - 2¹ = 2106362519 is a prime.

Together with 2106362519, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2106362521.

It is not a weakly prime, because it can be changed into another prime (2106362527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053181260 + 1053181261.

It is an arithmetic number, because the mean of its divisors is an integer number (1053181261).

Almost surely, 2^2106362521 is an apocalyptic number.

It is an amenable number.

2106362521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2106362521 is an equidigital number, since it uses as much as digits as its factorization.

2106362521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 2106362521 is about 45895.1252422302. The cubic root of 2106362521 is about 1281.8711486514.

Adding to 2106362521 its reverse (1252636012), we get a palindrome (3358998533).

The spelling of 2106362521 in words is "two billion, one hundred six million, three hundred sixty-two thousand, five hundred twenty-one".