5266623121 has 2 divisors, whose sum is σ = 5266623122. Its totient is φ = 5266623120.

The previous prime is 5266623119. The next prime is 5266623133. The reversal of 5266623121 is 1213266625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5152368400 + 114254721 = 71780^2 + 10689^2 .

It is a cyclic number.

It is not a de Polignac number, because 5266623121 - 2¹ = 5266623119 is a prime.

Together with 5266623119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5266623721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2633311560 + 2633311561.

It is an arithmetic number, because the mean of its divisors is an integer number (2633311561).

Almost surely, 2^5266623121 is an apocalyptic number.

It is an amenable number.

5266623121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5266623121 is an equidigital number, since it uses as much as digits as its factorization.

5266623121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 5266623121 is about 72571.5035051638. The cubic root of 5266623121 is about 1739.8457520596.

Adding to 5266623121 its reverse (1213266625), we get a palindrome (6479889746).

The spelling of 5266623121 in words is "five billion, two hundred sixty-six million, six hundred twenty-three thousand, one hundred twenty-one".