5147502121 has 4 divisors (see below), whose sum is σ = 5148213700. Its totient is φ = 5146790544.

The previous prime is 5147502091. The next prime is 5147502133. The reversal of 5147502121 is 1212057415.

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 4069036521 + 1078465600 = 63789^2 + 32840^2 .

It is a cyclic number.

It is not a de Polignac number, because 5147502121 - 2¹⁷ = 5147371049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5147502121.

It is not an unprimeable number, because it can be changed into a prime (5147502721) 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, 344826 + ... + 359443.

It is an arithmetic number, because the mean of its divisors is an integer number (1287053425).

Almost surely, 2^5147502121 is an apocalyptic number.

It is an amenable number.

5147502121 is a deficient number, since it is larger than the sum of its proper divisors (711579).

5147502121 is an equidigital number, since it uses as much as digits as its factorization.

5147502121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711578.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 5147502121 is about 71746.0948135855. The cubic root of 5147502121 is about 1726.6282597850.

Adding to 5147502121 its reverse (1212057415), we get a palindrome (6359559536).

The spelling of 5147502121 in words is "five billion, one hundred forty-seven million, five hundred two thousand, one hundred twenty-one".