4040021023 has 2 divisors, whose sum is σ = 4040021024. Its totient is φ = 4040021022.

The previous prime is 4040020993. The next prime is 4040021071. The reversal of 4040021023 is 3201200404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4040021023 - 2⁵ = 4040020991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4040020988 and 4040021006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4040022023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2020010511 + 2020010512.

It is an arithmetic number, because the mean of its divisors is an integer number (2020010512).

Almost surely, 2^4040021023 is an apocalyptic number.

4040021023 is a deficient number, since it is larger than the sum of its proper divisors (1).

4040021023 is an equidigital number, since it uses as much as digits as its factorization.

4040021023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 4040021023 is about 63561.1597046498. The cubic root of 4040021023 is about 1592.6776109606.

Adding to 4040021023 its reverse (3201200404), we get a palindrome (7241221427).

The spelling of 4040021023 in words is "four billion, forty million, twenty-one thousand, twenty-three".