400011042042431 has 2 divisors, whose sum is σ = 400011042042432. Its totient is φ = 400011042042430.

The previous prime is 400011042042419. The next prime is 400011042042473. The reversal of 400011042042431 is 134240240110004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400011042042431 - 2²² = 400011037848127 is a prime.

It is a super-2 number, since 2×400011042042431² (a number of 30 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 400011042042431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400011042842431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200005521021215 + 200005521021216.

It is an arithmetic number, because the mean of its divisors is an integer number (200005521021216).

Almost surely, 2^{400011042042431} is an apocalyptic number.

400011042042431 is a deficient number, since it is larger than the sum of its proper divisors (1).

400011042042431 is an equidigital number, since it uses as much as digits as its factorization.

400011042042431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 400011042042431 its reverse (134240240110004), we get a palindrome (534251282152435).

The spelling of 400011042042431 in words is "four hundred trillion, eleven billion, forty-two million, forty-two thousand, four hundred thirty-one".