4011021 has 12 divisors (see below), whose sum is σ = 6621472. Its totient is φ = 2291976.

The previous prime is 4011017. The next prime is 4011037. The reversal of 4011021 is 1201104.

It is a happy number.

4011021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4011021 - 2² = 4011017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4010994 and 4011012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4011011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31771 + ... + 31896.

Almost surely, 2^4011021 is an apocalyptic number.

It is an amenable number.

4011021 is a deficient number, since it is larger than the sum of its proper divisors (2610451).

4011021 is a wasteful number, since it uses less digits than its factorization.

4011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63680 (or 63677 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 4011021 is about 2002.7533547594. The cubic root of 4011021 is about 158.8857610641.

Adding to 4011021 its reverse (1201104), we get a palindrome (5212125).

The spelling of 4011021 in words is "four million, eleven thousand, twenty-one".