998221122212 has 12 divisors (see below), whose sum is σ = 1775524455516. Its totient is φ = 490928420640.

The previous prime is 998221122193. The next prime is 998221122251. The reversal of 998221122212 is 212221122899.

It can be written as a sum of positive squares in 2 ways, for example, as 130800848896 + 867420273316 = 361664^2 + 931354^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 998221122212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2045534843 + ... + 2045535330.

It is an arithmetic number, because the mean of its divisors is an integer number (147960371293).

Almost surely, 2^998221122212 is an apocalyptic number.

It is an amenable number.

998221122212 is a deficient number, since it is larger than the sum of its proper divisors (777303333304).

998221122212 is a wasteful number, since it uses less digits than its factorization.

998221122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4091070238 (or 4091070236 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The spelling of 998221122212 in words is "nine hundred ninety-eight billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred twelve".