400021112243 has 16 divisors (see below), whose sum is σ = 404949196800. Its totient is φ = 395129070720.

The previous prime is 400021112219. The next prime is 400021112251. The reversal of 400021112243 is 342211120004.

It is a cyclic number.

It is not a de Polignac number, because 400021112243 - 2²² = 400016917939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400021115243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24573755 + ... + 24590027.

It is an arithmetic number, because the mean of its divisors is an integer number (25309324800).

Almost surely, 2^400021112243 is an apocalyptic number.

400021112243 is a deficient number, since it is larger than the sum of its proper divisors (4928084557).

400021112243 is a wasteful number, since it uses less digits than its factorization.

400021112243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17362.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 400021112243 its reverse (342211120004), we get a palindrome (742232232247).

The spelling of 400021112243 in words is "four hundred billion, twenty-one million, one hundred twelve thousand, two hundred forty-three".