1001221222222 has 8 divisors (see below), whose sum is σ = 1617357359016. Its totient is φ = 462102102552.

The previous prime is 1001221222207. The next prime is 1001221222229. The reversal of 1001221222222 is 2222221221001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1001221222222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001221222229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19254254248 + ... + 19254254299.

It is an arithmetic number, because the mean of its divisors is an integer number (202169669877).

Almost surely, 2^{1001221222222} is an apocalyptic number.

1001221222222 is a deficient number, since it is larger than the sum of its proper divisors (616136136794).

1001221222222 is a wasteful number, since it uses less digits than its factorization.

1001221222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38508508562.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1001221222222 its reverse (2222221221001), we get a palindrome (3223442443223).

The spelling of 1001221222222 in words is "one trillion, one billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-two".