4012126921 has 8 divisors (see below), whose sum is σ = 4377919104. Its totient is φ = 3646510320.

The previous prime is 4012126903. The next prime is 4012126991. The reversal of 4012126921 is 1296212104.

4012126921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 4012126921 - 2⁹ = 4012126409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4012126921.

It is not an unprimeable number, because it can be changed into a prime (4012126991) 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, 6400 + ... + 89806.

It is an arithmetic number, because the mean of its divisors is an integer number (547239888).

Almost surely, 2^4012126921 is an apocalyptic number.

It is an amenable number.

4012126921 is a deficient number, since it is larger than the sum of its proper divisors (365792183).

4012126921 is a wasteful number, since it uses less digits than its factorization.

4012126921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87791.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 4012126921 is about 63341.3523774161. The cubic root of 4012126921 is about 1589.0036241315.

The spelling of 4012126921 in words is "four billion, twelve million, one hundred twenty-six thousand, nine hundred twenty-one".