222121023216 has 80 divisors (see below), whose sum is σ = 599981955840. Its totient is φ = 70676784640.

The previous prime is 222121023143. The next prime is 222121023217. The reversal of 222121023216 is 612320121222.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121023217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337180 + ... + 746948.

It is an arithmetic number, because the mean of its divisors is an integer number (7499774448).

Almost surely, 2^222121023216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222121023216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299990977920).

222121023216 is an abundant number, since it is smaller than the sum of its proper divisors (377860932624).

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

222121023216 is a wasteful number, since it uses less digits than its factorization.

222121023216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410294 (or 410288 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 222121023216 its reverse (612320121222), we get a palindrome (834441144438).

The spelling of 222121023216 in words is "two hundred twenty-two billion, one hundred twenty-one million, twenty-three thousand, two hundred sixteen".