4128821912 has 8 divisors (see below), whose sum is σ = 7741541100. Its totient is φ = 2064410952.

The previous prime is 4128821899. The next prime is 4128821941. The reversal of 4128821912 is 2191288214.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×4128821912² = 34094340762022671488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258051362 + ... + 258051377.

Almost surely, 2^4128821912 is an apocalyptic number.

It is an amenable number.

4128821912 is a deficient number, since it is larger than the sum of its proper divisors (3612719188).

4128821912 is a wasteful number, since it uses less digits than its factorization.

4128821912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516102745 (or 516102741 counting only the distinct ones).

The product of its digits is 18432, while the sum is 38.

The square root of 4128821912 is about 64255.9095492391. The cubic root of 4128821912 is about 1604.2623217589.

The spelling of 4128821912 in words is "four billion, one hundred twenty-eight million, eight hundred twenty-one thousand, nine hundred twelve".