4040031021 has 12 divisors (see below), whose sum is σ = 5832944928. Its totient is φ = 2486172624.

The previous prime is 4040030963. The next prime is 4040031049. The reversal of 4040031021 is 1201300404.

It is not a de Polignac number, because 4040031021 - 2¹¹ = 4040028973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4040031091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3983745 + ... + 3984758.

It is an arithmetic number, because the mean of its divisors is an integer number (486078744).

Almost surely, 2^4040031021 is an apocalyptic number.

It is an amenable number.

4040031021 is a deficient number, since it is larger than the sum of its proper divisors (1792913907).

4040031021 is a wasteful number, since it uses less digits than its factorization.

4040031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7968532 (or 7968519 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 4040031021 is about 63561.2383532606. The cubic root of 4040031021 is about 1592.6789247803.

Adding to 4040031021 its reverse (1201300404), we get a palindrome (5241331425).

The spelling of 4040031021 in words is "four billion, forty million, thirty-one thousand, twenty-one".