1001222121998 has 8 divisors (see below), whose sum is σ = 1716380780592. Its totient is φ = 429095195136.

The previous prime is 1001222121979. The next prime is 1001222122003. The reversal of 1001222121998 is 8991212221001.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35757932915 + ... + 35757932942.

It is an arithmetic number, because the mean of its divisors is an integer number (214547597574).

Almost surely, 2^{1001222121998} is an apocalyptic number.

1001222121998 is a deficient number, since it is larger than the sum of its proper divisors (715158658594).

1001222121998 is an equidigital number, since it uses as much as digits as its factorization.

1001222121998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71515865866.

The product of its (nonzero) digits is 10368, while the sum is 38.

Adding to 1001222121998 its reverse (8991212221001), we get a palindrome (9992434342999).

The spelling of 1001222121998 in words is "one trillion, one billion, two hundred twenty-two million, one hundred twenty-one thousand, nine hundred ninety-eight".