1121100042 has 16 divisors (see below), whose sum is σ = 2294344800. Its totient is φ = 365009232.

The previous prime is 1121099983. The next prime is 1121100083. The reversal of 1121100042 is 2400011211.

It is a happy 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 in 7 ways as a sum of consecutive naturals, for example, 2172417 + ... + 2172932.

It is an arithmetic number, because the mean of its divisors is an integer number (143396550).

Almost surely, 2^1121100042 is an apocalyptic number.

1121100042 is an abundant number, since it is smaller than the sum of its proper divisors (1173244758).

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

1121100042 is a wasteful number, since it uses less digits than its factorization.

1121100042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4345397.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1121100042 is about 33482.8320486783. The cubic root of 1121100042 is about 1038.8387068320.

Adding to 1121100042 its reverse (2400011211), we get a palindrome (3521111253).

The spelling of 1121100042 in words is "one billion, one hundred twenty-one million, one hundred thousand, forty-two".