40021135043 has 4 divisors (see below), whose sum is σ = 40028985888. Its totient is φ = 40013284200.

The previous prime is 40021134997. The next prime is 40021135103. The reversal of 40021135043 is 34053112004.

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

It is a cyclic number.

It is not a de Polignac number, because 40021135043 - 2²² = 40016940739 is a prime.

It is a super-2 number, since 2×40021135043² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40021135943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3917771 + ... + 3927972.

It is an arithmetic number, because the mean of its divisors is an integer number (10007246472).

Almost surely, 2^40021135043 is an apocalyptic number.

40021135043 is a deficient number, since it is larger than the sum of its proper divisors (7850845).

40021135043 is an equidigital number, since it uses as much as digits as its factorization.

40021135043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7850844.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 40021135043 its reverse (34053112004), we get a palindrome (74074247047).

The spelling of 40021135043 in words is "forty billion, twenty-one million, one hundred thirty-five thousand, forty-three".