2001222102222 has 48 divisors (see below), whose sum is σ = 5011085869920. Its totient is φ = 565353271296.

The previous prime is 2001222102181. The next prime is 2001222102239. The reversal of 2001222102222 is 2222012221002.

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 = 2001222102195 and 2001222102204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89217523 + ... + 89239950.

It is an arithmetic number, because the mean of its divisors is an integer number (104397622290).

Almost surely, 2^{2001222102222} is an apocalyptic number.

2001222102222 is an abundant number, since it is smaller than the sum of its proper divisors (3009863767698).

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

2001222102222 is a wasteful number, since it uses less digits than its factorization.

2001222102222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178457577 (or 178457574 counting only the distinct ones).

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

Adding to 2001222102222 its reverse (2222012221002), we get a palindrome (4223234323224).

The spelling of 2001222102222 in words is "two trillion, one billion, two hundred twenty-two million, one hundred two thousand, two hundred twenty-two".