222111122020 has 24 divisors (see below), whose sum is σ = 471051512568. Its totient is φ = 87964800000.

The previous prime is 222111121961. The next prime is 222111122029. The reversal of 222111122020 is 20221111222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 141332387364 + 80778734656 = 375942^2 + 284216^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222111121985 and 222111122003.

It is not an unprimeable number, because it can be changed into a prime (222111122029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54975981 + ... + 54980020.

It is an arithmetic number, because the mean of its divisors is an integer number (19627146357).

Almost surely, 2^222111122020 is an apocalyptic number.

222111122020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222111122020 is an abundant number, since it is smaller than the sum of its proper divisors (248940390548).

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

222111122020 is a wasteful number, since it uses less digits than its factorization.

222111122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109956111 (or 109956109 counting only the distinct ones).

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

Adding to 222111122020 its reverse (20221111222), we get a palindrome (242332233242).

The spelling of 222111122020 in words is "two hundred twenty-two billion, one hundred eleven million, one hundred twenty-two thousand, twenty".