1000222212220 has 384 divisors, whose sum is σ = 2704689211392. Its totient is φ = 301750272000.

The previous prime is 1000222212179. The next prime is 1000222212221. The reversal of 1000222212220 is 222122220001.

1000222212220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1000222212194 and 1000222212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000222212221) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1555555219 + ... + 1555555861.

It is an arithmetic number, because the mean of its divisors is an integer number (7043461488).

Almost surely, 2^{1000222212220} is an apocalyptic number.

1000222212220 is a gapful number since it is divisible by the number (10) 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 1000222212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1352344605696).

1000222212220 is an abundant number, since it is smaller than the sum of its proper divisors (1704466999172).

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

1000222212220 is a wasteful number, since it uses less digits than its factorization.

1000222212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 1000222212220 its reverse (222122220001), we get a palindrome (1222344432221).

It can be divided in two parts, 10002 and 22212220, that added together give a palindrome (22222222).

The spelling of 1000222212220 in words is "one trillion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty".