1001222220222 has 96 divisors (see below), whose sum is σ = 2555907374592. Its totient is φ = 277273409472.

The previous prime is 1001222220161. The next prime is 1001222220241. The reversal of 1001222220222 is 2220222221001.

1001222220222 is a `hidden beast` number, since 1 + 0 + 0 + 1 + 222 + 220 + 222 = 666.

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 = 1001222220195 and 1001222220204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 817813 + ... + 1634399.

It is an arithmetic number, because the mean of its divisors is an integer number (26624035152).

Almost surely, 2^{1001222220222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1001222220222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1277953687296).

1001222220222 is an abundant number, since it is smaller than the sum of its proper divisors (1554685154370).

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

1001222220222 is a wasteful number, since it uses less digits than its factorization.

1001222220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816902 (or 816899 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 1001222220222 its reverse (2220222221001), we get a palindrome (3221444441223).

The spelling of 1001222220222 in words is "one trillion, one billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twenty-two".