5115102121 has 4 divisors (see below), whose sum is σ = 5115619012. Its totient is φ = 5114585232.

The previous prime is 5115102079. The next prime is 5115102217. The reversal of 5115102121 is 1212015115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1212015115 = 5 ⋅242403023.

It can be written as a sum of positive squares in 2 ways, for example, as 2055352896 + 3059749225 = 45336^2 + 55315^2 .

It is a cyclic number.

It is not a de Polignac number, because 5115102121 - 2¹⁷ = 5114971049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5115102521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243306 + ... + 263491.

It is an arithmetic number, because the mean of its divisors is an integer number (1278904753).

Almost surely, 2^5115102121 is an apocalyptic number.

It is an amenable number.

5115102121 is a deficient number, since it is larger than the sum of its proper divisors (516891).

5115102121 is a wasteful number, since it uses less digits than its factorization.

5115102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516890.

The product of its (nonzero) digits is 100, while the sum is 19.

The square root of 5115102121 is about 71519.9421210616. The cubic root of 5115102121 is about 1722.9979849939.

Adding to 5115102121 its reverse (1212015115), we get a palindrome (6327117236).

The spelling of 5115102121 in words is "five billion, one hundred fifteen million, one hundred two thousand, one hundred twenty-one".