222111100000020 has 288 divisors, whose sum is σ = 782195393403648. Its totient is φ = 46096731648000.

The previous prime is 222111099999977. The next prime is 222111100000087. The reversal of 222111100000020 is 20000001111222.

It is a super-3 number, since 3×222111100000020³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 222111099999951 and 222111100000005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 39061500 + ... + 44384940.

It is an arithmetic number, because the mean of its divisors is an integer number (2715956227096).

Almost surely, 2^{222111100000020} is an apocalyptic number.

222111100000020 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 222111100000020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (391097696701824).

222111100000020 is an abundant number, since it is smaller than the sum of its proper divisors (560084293403628).

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

222111100000020 is a wasteful number, since it uses less digits than its factorization.

222111100000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5324303 (or 5324290 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 222111100000020 its reverse (20000001111222), we get a palindrome (242111101111242).

The spelling of 222111100000020 in words is "two hundred twenty-two trillion, one hundred eleven billion, one hundred million, twenty", and thus it is an aban number.