5123164021 has 2 divisors, whose sum is σ = 5123164022. Its totient is φ = 5123164020.

The previous prime is 5123164001. The next prime is 5123164027. The reversal of 5123164021 is 1204613215.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4831779121 + 291384900 = 69511^2 + 17070^2 .

It is a cyclic number.

It is not a de Polignac number, because 5123164021 - 2²¹ = 5121066869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5123164027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2561582010 + 2561582011.

It is an arithmetic number, because the mean of its divisors is an integer number (2561582011).

Almost surely, 2^5123164021 is an apocalyptic number.

It is an amenable number.

5123164021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5123164021 is an equidigital number, since it uses as much as digits as its factorization.

5123164021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 5123164021 is about 71576.2811341858. The cubic root of 5123164021 is about 1723.9027141563.

Adding to 5123164021 its reverse (1204613215), we get a palindrome (6327777236).

The spelling of 5123164021 in words is "five billion, one hundred twenty-three million, one hundred sixty-four thousand, twenty-one".