400222232301221 has 64 divisors (see below), whose sum is σ = 476199759974400. Its totient is φ = 332245402352640.

The previous prime is 400222232301197. The next prime is 400222232301259. The reversal of 400222232301221 is 122103232222004.

It is a cyclic number.

It is not a de Polignac number, because 400222232301221 - 2¹⁰ = 400222232300197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400222232301421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (37) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 737788136 + ... + 738330398.

It is an arithmetic number, because the mean of its divisors is an integer number (7440621249600).

Almost surely, 2^{400222232301221} is an apocalyptic number.

It is an amenable number.

400222232301221 is a deficient number, since it is larger than the sum of its proper divisors (75977527673179).

400222232301221 is a wasteful number, since it uses less digits than its factorization.

400222232301221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542946.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 400222232301221 its reverse (122103232222004), we get a palindrome (522325464523225).

The spelling of 400222232301221 in words is "four hundred trillion, two hundred twenty-two billion, two hundred thirty-two million, three hundred one thousand, two hundred twenty-one".