5166342121 has 2 divisors, whose sum is σ = 5166342122. Its totient is φ = 5166342120.

The previous prime is 5166342101. The next prime is 5166342127. The reversal of 5166342121 is 1212436615.

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., 3722342121 + 1444000000 = 61011^2 + 38000^2 .

It is a cyclic number.

It is not a de Polignac number, because 5166342121 - 2⁷ = 5166341993 is a prime.

It is a super-2 number, since 2×5166342121² = 53382181822437557282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5166342127) 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, 2583171060 + 2583171061.

It is an arithmetic number, because the mean of its divisors is an integer number (2583171061).

Almost surely, 2^5166342121 is an apocalyptic number.

It is an amenable number.

5166342121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5166342121 is an equidigital number, since it uses as much as digits as its factorization.

5166342121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 5166342121 is about 71877.2712406363. The cubic root of 5166342121 is about 1728.7321974261.

Adding to 5166342121 its reverse (1212436615), we get a palindrome (6378778736).

The spelling of 5166342121 in words is "five billion, one hundred sixty-six million, three hundred forty-two thousand, one hundred twenty-one".