1111201998 has 32 divisors (see below), whose sum is σ = 2259366912. Its totient is φ = 364291200.

The previous prime is 1111201981. The next prime is 1111202003. The reversal of 1111201998 is 8991021111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82563 + ... + 95073.

It is an arithmetic number, because the mean of its divisors is an integer number (70605216).

Almost surely, 2^1111201998 is an apocalyptic number.

1111201998 is an abundant number, since it is smaller than the sum of its proper divisors (1148164914).

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

1111201998 is a wasteful number, since it uses less digits than its factorization.

1111201998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12760.

The product of its (nonzero) digits is 1296, while the sum is 33.

The square root of 1111201998 is about 33334.6966087889. The cubic root of 1111201998 is about 1035.7724085509.

The spelling of 1111201998 in words is "one billion, one hundred eleven million, two hundred one thousand, nine hundred ninety-eight".