5105412121 has 4 divisors (see below), whose sum is σ = 5111723700. Its totient is φ = 5099100544.

The previous prime is 5105412113. The next prime is 5105412133. The reversal of 5105412121 is 1212145015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4929584521 + 175827600 = 70211^2 + 13260^2 .

It is a cyclic number.

It is not a de Polignac number, because 5105412121 - 2³ = 5105412113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5105412092 and 5105412101.

It is not an unprimeable number, because it can be changed into a prime (5105512121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3154576 + ... + 3156193.

It is an arithmetic number, because the mean of its divisors is an integer number (1277930925).

Almost surely, 2^5105412121 is an apocalyptic number.

It is an amenable number.

5105412121 is a deficient number, since it is larger than the sum of its proper divisors (6311579).

5105412121 is an equidigital number, since it uses as much as digits as its factorization.

5105412121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6311578.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 5105412121 is about 71452.1666641397. The cubic root of 5105412121 is about 1721.9092869902.

Adding to 5105412121 its reverse (1212145015), we get a palindrome (6317557136).

The spelling of 5105412121 in words is "five billion, one hundred five million, four hundred twelve thousand, one hundred twenty-one".