4878812121 has 16 divisors (see below), whose sum is σ = 6667260864. Its totient is φ = 3171700224.

The previous prime is 4878812101. The next prime is 4878812123. The reversal of 4878812121 is 1212188784.

It is not a de Polignac number, because 4878812121 - 2¹⁰ = 4878811097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4878812123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48945 + ... + 110241.

It is an arithmetic number, because the mean of its divisors is an integer number (416703804).

Almost surely, 2^4878812121 is an apocalyptic number.

It is an amenable number.

4878812121 is a deficient number, since it is larger than the sum of its proper divisors (1788448743).

4878812121 is a wasteful number, since it uses less digits than its factorization.

4878812121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61960.

The product of its digits is 57344, while the sum is 42.

The square root of 4878812121 is about 69848.4940496214. The cubic root of 4878812121 is about 1696.0475792887.

The spelling of 4878812121 in words is "four billion, eight hundred seventy-eight million, eight hundred twelve thousand, one hundred twenty-one".