240040302021 has 12 divisors (see below), whose sum is σ = 373396025548. Its totient is φ = 147717108864.

The previous prime is 240040302017. The next prime is 240040302049. The reversal of 240040302021 is 120203040042.

240040302021 is a `hidden beast` number, since 240 + 0 + 403 + 0 + 2 + 0 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 112080996225 + 127959305796 = 334785^2 + 357714^2 .

It is not a de Polignac number, because 240040302021 - 2² = 240040302017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 240040301985 and 240040302003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240040302721) 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, 1025813140 + ... + 1025813373.

Almost surely, 2^240040302021 is an apocalyptic number.

It is an amenable number.

240040302021 is a deficient number, since it is larger than the sum of its proper divisors (133355723527).

240040302021 is a wasteful number, since it uses less digits than its factorization.

240040302021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2051626532 (or 2051626529 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 240040302021 its reverse (120203040042), we get a palindrome (360243342063).

The spelling of 240040302021 in words is "two hundred forty billion, forty million, three hundred two thousand, twenty-one".