121100111042 has 32 divisors (see below), whose sum is σ = 193412620800. Its totient is φ = 56775700800.

The previous prime is 121100111039. The next prime is 121100111053. The reversal of 121100111042 is 240111001121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62867 + ... + 496137.

It is an arithmetic number, because the mean of its divisors is an integer number (6044144400).

Almost surely, 2^121100111042 is an apocalyptic number.

121100111042 is a deficient number, since it is larger than the sum of its proper divisors (72312509758).

121100111042 is a wasteful number, since it uses less digits than its factorization.

121100111042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433442.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121100111042 its reverse (240111001121), we get a palindrome (361211112163).

The spelling of 121100111042 in words is "one hundred twenty-one billion, one hundred million, one hundred eleven thousand, forty-two".