400421242124003 has 4 divisors (see below), whose sum is σ = 404385808877808. Its totient is φ = 396456675370200.

The previous prime is 400421242123943. The next prime is 400421242124027. The reversal of 400421242124003 is 300421242124004.

It is a happy number.

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 400421242124003 - 2¹⁴ = 400421242107619 is a prime.

It is a super-2 number, since 2×400421242124003² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400421242124203) 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, 1982283376751 + ... + 1982283376952.

It is an arithmetic number, because the mean of its divisors is an integer number (101096452219452).

Almost surely, 2^{400421242124003} is an apocalyptic number.

400421242124003 is a deficient number, since it is larger than the sum of its proper divisors (3964566753805).

400421242124003 is a wasteful number, since it uses less digits than its factorization.

400421242124003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3964566753804.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 400421242124003 its reverse (300421242124004), we get a palindrome (700842484248007).

Subtracting from 400421242124003 its reverse (300421242124004), we obtain a palindrome (99999999999999).

The spelling of 400421242124003 in words is "four hundred trillion, four hundred twenty-one billion, two hundred forty-two million, one hundred twenty-four thousand, three".