1112211998 has 4 divisors (see below), whose sum is σ = 1668318000. Its totient is φ = 556105998.

The previous prime is 1112211979. The next prime is 1112212001. The reversal of 1112211998 is 8991122111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8991122111 = 101 ⋅89021011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278052998 + ... + 278053001.

It is an arithmetic number, because the mean of its divisors is an integer number (417079500).

Almost surely, 2^1112211998 is an apocalyptic number.

1112211998 is a deficient number, since it is larger than the sum of its proper divisors (556106002).

1112211998 is an equidigital number, since it uses as much as digits as its factorization.

1112211998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556106001.

The product of its digits is 2592, while the sum is 35.

The square root of 1112211998 is about 33349.8425483540. The cubic root of 1112211998 is about 1036.0861268916.

The spelling of 1112211998 in words is "one billion, one hundred twelve million, two hundred eleven thousand, nine hundred ninety-eight".