400421012231 has 4 divisors (see below), whose sum is σ = 400848356832. Its totient is φ = 399993667632.

The previous prime is 400421012227. The next prime is 400421012239. The reversal of 400421012231 is 132210124004.

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 400421012231 - 2² = 400421012227 is a prime.

It is a super-2 number, since 2×400421012231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400421012239) 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, 213670895 + ... + 213672768.

It is an arithmetic number, because the mean of its divisors is an integer number (100212089208).

Almost surely, 2^400421012231 is an apocalyptic number.

400421012231 is a deficient number, since it is larger than the sum of its proper divisors (427344601).

400421012231 is an equidigital number, since it uses as much as digits as its factorization.

400421012231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427344600.

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

Adding to 400421012231 its reverse (132210124004), we get a palindrome (532631136235).

The spelling of 400421012231 in words is "four hundred billion, four hundred twenty-one million, twelve thousand, two hundred thirty-one".