5121212660 has 96 divisors (see below), whose sum is σ = 11650383360. Its totient is φ = 1885137408.

The previous prime is 5121212659. The next prime is 5121212713. The reversal of 5121212660 is 662121215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5295497 + ... + 5296463.

It is an arithmetic number, because the mean of its divisors is an integer number (121358160).

Almost surely, 2^5121212660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5121212660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5825191680).

5121212660 is an abundant number, since it is smaller than the sum of its proper divisors (6529170700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5121212660 is a wasteful number, since it uses less digits than its factorization.

5121212660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425 (or 1423 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 5121212660 is about 71562.6484976625. The cubic root of 5121212660 is about 1723.6838140326.

Adding to 5121212660 its reverse (662121215), we get a palindrome (5783333875).

The spelling of 5121212660 in words is "five billion, one hundred twenty-one million, two hundred twelve thousand, six hundred sixty".