221403201222 has 48 divisors (see below), whose sum is σ = 515199087360. Its totient is φ = 63246051792.

The previous prime is 221403201209. The next prime is 221403201247. The reversal of 221403201222 is 222102304122.

It is a super-2 number, since 2×221403201222² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1542103 + ... + 1679549.

It is an arithmetic number, because the mean of its divisors is an integer number (10733314320).

Almost surely, 2^221403201222 is an apocalyptic number.

221403201222 is an abundant number, since it is smaller than the sum of its proper divisors (293795886138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221403201222 is a wasteful number, since it uses less digits than its factorization.

221403201222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142945 (or 142938 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 221403201222 its reverse (222102304122), we get a palindrome (443505505344).

The spelling of 221403201222 in words is "two hundred twenty-one billion, four hundred three million, two hundred one thousand, two hundred twenty-two".