400031221105 has 16 divisors (see below), whose sum is σ = 506710166400. Its totient is φ = 302337014400.

The previous prime is 400031221103. The next prime is 400031221111. The reversal of 400031221105 is 501122130004.

It is not a de Polignac number, because 400031221105 - 2¹ = 400031221103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (400031221103) 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, 5830596 + ... + 5898805.

It is an arithmetic number, because the mean of its divisors is an integer number (31669385400).

Almost surely, 2^400031221105 is an apocalyptic number.

It is an amenable number.

400031221105 is a deficient number, since it is larger than the sum of its proper divisors (106678945295).

400031221105 is a wasteful number, since it uses less digits than its factorization.

400031221105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11729784.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 400031221105 its reverse (501122130004), we get a palindrome (901153351109).

The spelling of 400031221105 in words is "four hundred billion, thirty-one million, two hundred twenty-one thousand, one hundred five".