222011123220 has 36 divisors (see below), whose sum is σ = 673433740980. Its totient is φ = 59202966144.

The previous prime is 222011123219. The next prime is 222011123231. The reversal of 222011123220 is 22321110222.

It can be written as a sum of positive squares in 2 ways, for example, as 76053505284 + 145957617936 = 275778^2 + 382044^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 222011123193 and 222011123202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 616697385 + ... + 616697744.

It is an arithmetic number, because the mean of its divisors is an integer number (18706492805).

Almost surely, 2^222011123220 is an apocalyptic number.

222011123220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222011123220 is an abundant number, since it is smaller than the sum of its proper divisors (451422617760).

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

222011123220 is a wasteful number, since it uses less digits than its factorization.

222011123220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233395144 (or 1233395139 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 222011123220 its reverse (22321110222), we get a palindrome (244332233442).

The spelling of 222011123220 in words is "two hundred twenty-two billion, eleven million, one hundred twenty-three thousand, two hundred twenty".