1121100219978 has 32 divisors (see below), whose sum is σ = 2291682480192. Its totient is φ = 365542224000.

The previous prime is 1121100219919. The next prime is 1121100219979. The reversal of 1121100219978 is 8799120011211.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1121100219979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11094283 + ... + 11194878.

It is an arithmetic number, because the mean of its divisors is an integer number (71615077506).

Almost surely, 2^{1121100219978} is an apocalyptic number.

1121100219978 is an abundant number, since it is smaller than the sum of its proper divisors (1170582260214).

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

1121100219978 is a wasteful number, since it uses less digits than its factorization.

1121100219978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22289350.

The product of its (nonzero) digits is 18144, while the sum is 42.

The spelling of 1121100219978 in words is "one trillion, one hundred twenty-one billion, one hundred million, two hundred nineteen thousand, nine hundred seventy-eight".