1121201998 has 16 divisors (see below), whose sum is σ = 1934306784. Its totient is φ = 477453600.

The previous prime is 1121201993. The next prime is 1121202001. The reversal of 1121201998 is 8991021211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121201993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252853 + ... + 257248.

It is an arithmetic number, because the mean of its divisors is an integer number (120894174).

Almost surely, 2^1121201998 is an apocalyptic number.

1121201998 is a deficient number, since it is larger than the sum of its proper divisors (813104786).

1121201998 is a wasteful number, since it uses less digits than its factorization.

1121201998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510267.

The product of its (nonzero) digits is 2592, while the sum is 34.

The square root of 1121201998 is about 33484.3545256587. The cubic root of 1121201998 is about 1038.8701975181.

The spelling of 1121201998 in words is "one billion, one hundred twenty-one million, two hundred one thousand, nine hundred ninety-eight".