222221111020 has 144 divisors (see below), whose sum is σ = 502538595552. Its totient is φ = 82517401600.

The previous prime is 222221111017. The next prime is 222221111027. The reversal of 222221111020 is 20111122222.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 222221110985 and 222221111003.

It is not an unprimeable number, because it can be changed into a prime (222221111027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 202571112 + ... + 202572208.

It is an arithmetic number, because the mean of its divisors is an integer number (3489851358).

Almost surely, 2^222221111020 is an apocalyptic number.

222221111020 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 222221111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251269297776).

222221111020 is an abundant number, since it is smaller than the sum of its proper divisors (280317484532).

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

222221111020 is a wasteful number, since it uses less digits than its factorization.

222221111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588 (or 1569 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 222221111020 its reverse (20111122222), we get a palindrome (242332233242).

The spelling of 222221111020 in words is "two hundred twenty-two billion, two hundred twenty-one million, one hundred eleven thousand, twenty".