121100101111 has 16 divisors (see below), whose sum is σ = 134351642880. Its totient is φ = 108237683520.

The previous prime is 121100101093. The next prime is 121100101139. The reversal of 121100101111 is 111101001121.

It is a cyclic number.

It is not a de Polignac number, because 121100101111 - 2⁵ = 121100101079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100101181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226990 + ... + 541963.

It is an arithmetic number, because the mean of its divisors is an integer number (8396977680).

Almost surely, 2^121100101111 is an apocalyptic number.

121100101111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121100101111 is a deficient number, since it is larger than the sum of its proper divisors (13251541769).

121100101111 is a wasteful number, since it uses less digits than its factorization.

121100101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769206.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 121100101111 its reverse (111101001121), we get a palindrome (232201102232).

It can be divided in two parts, 12110010 and 1111, that added together give a palindrome (12111121).

The spelling of 121100101111 in words is "one hundred twenty-one billion, one hundred million, one hundred one thousand, one hundred eleven".