221422402212 has 96 divisors (see below), whose sum is σ = 572068224000. Its totient is φ = 66098736000.

The previous prime is 221422402207. The next prime is 221422402219. The reversal of 221422402212 is 212204224122.

It is not an unprimeable number, because it can be changed into a prime (221422402219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2611339 + ... + 2694797.

It is an arithmetic number, because the mean of its divisors is an integer number (5959044000).

Almost surely, 2^221422402212 is an apocalyptic number.

221422402212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221422402212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286034112000).

221422402212 is an abundant number, since it is smaller than the sum of its proper divisors (350645821788).

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

221422402212 is a wasteful number, since it uses less digits than its factorization.

221422402212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83777 (or 83775 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 221422402212 its reverse (212204224122), we get a palindrome (433626626334).

The spelling of 221422402212 in words is "two hundred twenty-one billion, four hundred twenty-two million, four hundred two thousand, two hundred twelve".