400421242124203 has 2 divisors, whose sum is σ = 400421242124204. Its totient is φ = 400421242124202.

The previous prime is 400421242124177. The next prime is 400421242124249. The reversal of 400421242124203 is 302421242124004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400421242124203 - 2¹³ = 400421242116011 is a prime.

It is a super-2 number, since 2×400421242124203² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (400421242124303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200210621062101 + 200210621062102.

It is an arithmetic number, because the mean of its divisors is an integer number (200210621062102).

Almost surely, 2^{400421242124203} is an apocalyptic number.

400421242124203 is a deficient number, since it is larger than the sum of its proper divisors (1).

400421242124203 is an equidigital number, since it uses as much as digits as its factorization.

400421242124203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 400421242124203 its reverse (302421242124004), we get a palindrome (702842484248207).

The spelling of 400421242124203 in words is "four hundred trillion, four hundred twenty-one billion, two hundred forty-two million, one hundred twenty-four thousand, two hundred three".