400220421331 has 4 divisors (see below), whose sum is σ = 409981895064. Its totient is φ = 390458947600.

The previous prime is 400220421313. The next prime is 400220421343. The reversal of 400220421331 is 133124022004.

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 400220421331 - 2⁵ = 400220421299 is a prime.

It is a super-2 number, since 2×400220421331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400220421031) 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, 4880736805 + ... + 4880736886.

It is an arithmetic number, because the mean of its divisors is an integer number (102495473766).

Almost surely, 2^400220421331 is an apocalyptic number.

400220421331 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

400220421331 is a deficient number, since it is larger than the sum of its proper divisors (9761473733).

400220421331 is an equidigital number, since it uses as much as digits as its factorization.

400220421331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9761473732.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 400220421331 its reverse (133124022004), we get a palindrome (533344443335).

The spelling of 400220421331 in words is "four hundred billion, two hundred twenty million, four hundred twenty-one thousand, three hundred thirty-one".