4021115021 has 32 divisors (see below), whose sum is σ = 5074157568. Its totient is φ = 3095547840.

The previous prime is 4021115003. The next prime is 4021115023. The reversal of 4021115021 is 1205111204.

4021115021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4021115021 - 2¹⁴ = 4021098637 is a prime.

It is a super-2 number, since 2×4021115021² = 32338732024223660882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021115023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2766731 + ... + 2768183.

It is an arithmetic number, because the mean of its divisors is an integer number (158567424).

Almost surely, 2^4021115021 is an apocalyptic number.

It is an amenable number.

4021115021 is a deficient number, since it is larger than the sum of its proper divisors (1053042547).

4021115021 is a wasteful number, since it uses less digits than its factorization.

4021115021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 4021115021 is about 63412.2623867025. The cubic root of 4021115021 is about 1590.1893187280.

Adding to 4021115021 its reverse (1205111204), we get a palindrome (5226226225).

The spelling of 4021115021 in words is "four billion, twenty-one million, one hundred fifteen thousand, twenty-one".