400020221222 has 16 divisors (see below), whose sum is σ = 607112567712. Its totient is φ = 197663211840.

The previous prime is 400020221177. The next prime is 400020221231. The reversal of 400020221222 is 222122020004.

It is a self number, because there is not a number n which added to its sum of digits gives 400020221222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3403679 + ... + 3519242.

It is an arithmetic number, because the mean of its divisors is an integer number (37944535482).

Almost surely, 2^400020221222 is an apocalyptic number.

400020221222 is a deficient number, since it is larger than the sum of its proper divisors (207092346490).

400020221222 is a wasteful number, since it uses less digits than its factorization.

400020221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6923263.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 400020221222 its reverse (222122020004), we get a palindrome (622142241226).

The spelling of 400020221222 in words is "four hundred billion, twenty million, two hundred twenty-one thousand, two hundred twenty-two".