4013234021 has 4 divisors (see below), whose sum is σ = 4015378572. Its totient is φ = 4011089472.

The previous prime is 4013233997. The next prime is 4013234039. The reversal of 4013234021 is 1204323104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1870562500 + 2142671521 = 43250^2 + 46289^2 .

It is a cyclic number.

It is not a de Polignac number, because 4013234021 - 2²² = 4009039717 is a prime.

It is a super-2 number, since 2×4013234021² = 32212094614623656882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4013233984 and 4013234002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4013230021) 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 3 ways as a sum of consecutive naturals, for example, 1069466 + ... + 1073211.

It is an arithmetic number, because the mean of its divisors is an integer number (1003844643).

Almost surely, 2^4013234021 is an apocalyptic number.

It is an amenable number.

4013234021 is a deficient number, since it is larger than the sum of its proper divisors (2144551).

4013234021 is a wasteful number, since it uses less digits than its factorization.

4013234021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144550.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 4013234021 is about 63350.0909312686. The cubic root of 4013234021 is about 1589.1497664116.

Adding to 4013234021 its reverse (1204323104), we get a palindrome (5217557125).

The spelling of 4013234021 in words is "four billion, thirteen million, two hundred thirty-four thousand, twenty-one".