2400243221421 has 24 divisors (see below), whose sum is σ = 3579018782976. Its totient is φ = 1548474131520.

The previous prime is 2400243221353. The next prime is 2400243221527. The reversal of 2400243221421 is 1241223420042.

It is a happy number.

2400243221421 is a `hidden beast` number, since 2 + 400 + 2 + 43 + 2 + 214 + 2 + 1 = 666.

2400243221421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2400243221421 - 2⁷ = 2400243221293 is a prime.

It is a super-2 number, since 2×2400243221421² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2400243221021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6400126 + ... + 6764768.

It is an arithmetic number, because the mean of its divisors is an integer number (149125782624).

Almost surely, 2^{2400243221421} is an apocalyptic number.

It is an amenable number.

2400243221421 is a deficient number, since it is larger than the sum of its proper divisors (1178775561555).

2400243221421 is a wasteful number, since it uses less digits than its factorization.

2400243221421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388273 (or 388270 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 2400243221421 its reverse (1241223420042), we get a palindrome (3641466641463).

The spelling of 2400243221421 in words is "two trillion, four hundred billion, two hundred forty-three million, two hundred twenty-one thousand, four hundred twenty-one".