222102121220 has 96 divisors (see below), whose sum is σ = 564660294912. Its totient is φ = 71636963328.

The previous prime is 222102121217. The next prime is 222102121229. The reversal of 222102121220 is 22121201222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (222102121229) 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, 5446547 + ... + 5487173.

It is an arithmetic number, because the mean of its divisors is an integer number (5881878072).

Almost surely, 2^222102121220 is an apocalyptic number.

222102121220 is a gapful number since it is divisible by the number (20) 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 222102121220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282330147456).

222102121220 is an abundant number, since it is smaller than the sum of its proper divisors (342558173692).

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

222102121220 is a wasteful number, since it uses less digits than its factorization.

222102121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42957 (or 42955 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222102121220 its reverse (22121201222), we get a palindrome (244223322442).

The spelling of 222102121220 in words is "two hundred twenty-two billion, one hundred two million, one hundred twenty-one thousand, two hundred twenty".