121100111066 has 16 divisors (see below), whose sum is σ = 199309279968. Its totient is φ = 54727321200.

The previous prime is 121100111053. The next prime is 121100111081. The reversal of 121100111066 is 660111001121.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15905300 + ... + 15912911.

It is an arithmetic number, because the mean of its divisors is an integer number (12456829998).

Almost surely, 2^121100111066 is an apocalyptic number.

121100111066 is a deficient number, since it is larger than the sum of its proper divisors (78209168902).

121100111066 is a wasteful number, since it uses less digits than its factorization.

121100111066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31818397.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 121100111066 its reverse (660111001121), we get a palindrome (781211112187).

The spelling of 121100111066 in words is "one hundred twenty-one billion, one hundred million, one hundred eleven thousand, sixty-six".