400222423221121 has 4 divisors (see below), whose sum is σ = 400436331519744. Its totient is φ = 400008514922500.

The previous prime is 400222423221041. The next prime is 400222423221233. The reversal of 400222423221121 is 121122324222004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400222423221121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400222423221121.

It is not an unprimeable number, because it can be changed into a prime (400222423021121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106954146505 + ... + 106954150246.

It is an arithmetic number, because the mean of its divisors is an integer number (100109082879936).

Almost surely, 2^{400222423221121} is an apocalyptic number.

It is an amenable number.

400222423221121 is a deficient number, since it is larger than the sum of its proper divisors (213908298623).

400222423221121 is a wasteful number, since it uses less digits than its factorization.

400222423221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213908298622.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 400222423221121 its reverse (121122324222004), we get a palindrome (521344747443125).

The spelling of 400222423221121 in words is "four hundred trillion, two hundred twenty-two billion, four hundred twenty-three million, two hundred twenty-one thousand, one hundred twenty-one".