4021031021 has 16 divisors (see below), whose sum is σ = 4627983360. Its totient is φ = 3422269440.

The previous prime is 4021031017. The next prime is 4021031087. The reversal of 4021031021 is 1201301204.

It is a cyclic number.

It is not a de Polignac number, because 4021031021 - 2² = 4021031017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4021030987 and 4021031005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021001021) 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, 972260 + ... + 976386.

It is an arithmetic number, because the mean of its divisors is an integer number (289248960).

Almost surely, 2^4021031021 is an apocalyptic number.

It is an amenable number.

4021031021 is a deficient number, since it is larger than the sum of its proper divisors (606952339).

4021031021 is a wasteful number, since it uses less digits than its factorization.

4021031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 4021031021 is about 63411.6000507794. The cubic root of 4021031021 is about 1590.1782457767.

Adding to 4021031021 its reverse (1201301204), we get a palindrome (5222332225).

The spelling of 4021031021 in words is "four billion, twenty-one million, thirty-one thousand, twenty-one".