400303221321 has 16 divisors (see below), whose sum is σ = 566841336768. Its totient is φ = 250411814400.

The previous prime is 400303221293. The next prime is 400303221341. The reversal of 400303221321 is 123122303004.

It is not a de Polignac number, because 400303221321 - 2⁷ = 400303221193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400303221341) 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, 11839740 + ... + 11873501.

It is an arithmetic number, because the mean of its divisors is an integer number (35427583548).

Almost surely, 2^400303221321 is an apocalyptic number.

It is an amenable number.

400303221321 is a deficient number, since it is larger than the sum of its proper divisors (166538115447).

400303221321 is a wasteful number, since it uses less digits than its factorization.

400303221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23713592.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 400303221321 its reverse (123122303004), we get a palindrome (523425524325).

The spelling of 400303221321 in words is "four hundred billion, three hundred three million, two hundred twenty-one thousand, three hundred twenty-one".