400222442021 has 4 divisors (see below), whose sum is σ = 400362824544. Its totient is φ = 400082059500.

The previous prime is 400222442017. The next prime is 400222442093. The reversal of 400222442021 is 120244222004.

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 not a de Polignac number, because 400222442021 - 2² = 400222442017 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 (400222472021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70186985 + ... + 70192686.

It is an arithmetic number, because the mean of its divisors is an integer number (100090706136).

Almost surely, 2^400222442021 is an apocalyptic number.

It is an amenable number.

400222442021 is a deficient number, since it is larger than the sum of its proper divisors (140382523).

400222442021 is a wasteful number, since it uses less digits than its factorization.

400222442021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140382522.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 400222442021 its reverse (120244222004), we get a palindrome (520466664025).

The spelling of 400222442021 in words is "four hundred billion, two hundred twenty-two million, four hundred forty-two thousand, twenty-one".