240342402421 has 32 divisors (see below), whose sum is σ = 277473715200. Its totient is φ = 206157934080.

The previous prime is 240342402379. The next prime is 240342402427. The reversal of 240342402421 is 124204243042.

It is a cyclic number.

It is not a de Polignac number, because 240342402421 - 2²⁷ = 240208184693 is a prime.

It is a super-2 number, since 2×240342402421² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 240342402421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240342402427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2490940 + ... + 2585626.

It is an arithmetic number, because the mean of its divisors is an integer number (8671053600).

Almost surely, 2^240342402421 is an apocalyptic number.

It is an amenable number.

240342402421 is a deficient number, since it is larger than the sum of its proper divisors (37131312779).

240342402421 is a wasteful number, since it uses less digits than its factorization.

240342402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94909.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 240342402421 its reverse (124204243042), we get a palindrome (364546645463).

The spelling of 240342402421 in words is "two hundred forty billion, three hundred forty-two million, four hundred two thousand, four hundred twenty-one".