4021658121 has 16 divisors (see below), whose sum is σ = 5834226944. Its totient is φ = 2449350144.

The previous prime is 4021658083. The next prime is 4021658141. The reversal of 4021658121 is 1218561204.

It is not a de Polignac number, because 4021658121 - 2³¹ = 1874174473 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4021658141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 527761 + ... + 535326.

It is an arithmetic number, because the mean of its divisors is an integer number (364639184).

Almost surely, 2^4021658121 is an apocalyptic number.

It is an amenable number.

4021658121 is a deficient number, since it is larger than the sum of its proper divisors (1812568823).

4021658121 is a wasteful number, since it uses less digits than its factorization.

4021658121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063200.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 4021658121 is about 63416.5445368951. The cubic root of 4021658121 is about 1590.2609069099.

The spelling of 4021658121 in words is "four billion, twenty-one million, six hundred fifty-eight thousand, one hundred twenty-one".