5205215121 has 8 divisors (see below), whose sum is σ = 7028138880. Its totient is φ = 3426217392.

The previous prime is 5205215117. The next prime is 5205215131. The reversal of 5205215121 is 1215125025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5205215121 - 2² = 5205215117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5205215091 and 5205215100.

It is not an unprimeable number, because it can be changed into a prime (5205215111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10981230 + ... + 10981703.

It is an arithmetic number, because the mean of its divisors is an integer number (878517360).

Almost surely, 2^5205215121 is an apocalyptic number.

It is an amenable number.

5205215121 is a deficient number, since it is larger than the sum of its proper divisors (1822923759).

5205215121 is a wasteful number, since it uses less digits than its factorization.

5205215121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21963015.

The product of its (nonzero) digits is 1000, while the sum is 24.

The square root of 5205215121 is about 72147.1768054717. The cubic root of 5205215121 is about 1733.0571891900.

The spelling of 5205215121 in words is "five billion, two hundred five million, two hundred fifteen thousand, one hundred twenty-one".