400031221109 has 32 divisors (see below), whose sum is σ = 447455232000. Its totient is φ = 355137451200.

The previous prime is 400031221103. The next prime is 400031221111. The reversal of 400031221109 is 901122130004.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400031221109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400031221103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115380794 + ... + 115384260.

It is an arithmetic number, because the mean of its divisors is an integer number (13982976000).

Almost surely, 2^400031221109 is an apocalyptic number.

It is an amenable number.

400031221109 is a deficient number, since it is larger than the sum of its proper divisors (47424010891).

400031221109 is a wasteful number, since it uses less digits than its factorization.

400031221109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 400031221109 in words is "four hundred billion, thirty-one million, two hundred twenty-one thousand, one hundred nine".