4312121872 has 20 divisors (see below), whose sum is σ = 8549033680. Its totient is φ = 2105919648.

The previous prime is 4312121867. The next prime is 4312121897. The reversal of 4312121872 is 2781212134.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3133122 + ... + 3134497.

It is an arithmetic number, because the mean of its divisors is an integer number (427451684).

Almost surely, 2^4312121872 is an apocalyptic number.

It is an amenable number.

4312121872 is a deficient number, since it is larger than the sum of its proper divisors (4236911808).

4312121872 is a wasteful number, since it uses less digits than its factorization.

4312121872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6267670 (or 6267664 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 4312121872 is about 65666.7486023177. The cubic root of 4312121872 is about 1627.6599430195.

The spelling of 4312121872 in words is "four billion, three hundred twelve million, one hundred twenty-one thousand, eight hundred seventy-two".