121100000010111 has 12 divisors (see below), whose sum is σ = 174991008043488. Its totient is φ = 80701586044704.

The previous prime is 121100000010049. The next prime is 121100000010131. The reversal of 121100000010111 is 111010000001121.

It is not a de Polignac number, because 121100000010111 - 2¹³ = 121100000001919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 121100000010093 and 121100000010102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100000010131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2645583790 + ... + 2645629563.

It is an arithmetic number, because the mean of its divisors is an integer number (14582584003624).

Almost surely, 2^{121100000010111} is an apocalyptic number.

121100000010111 is a deficient number, since it is larger than the sum of its proper divisors (53891008033377).

121100000010111 is a wasteful number, since it uses less digits than its factorization.

121100000010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5291215902 (or 5291215899 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 121100000010111 its reverse (111010000001121), we get a palindrome (232110000011232).

The spelling of 121100000010111 in words is "one hundred twenty-one trillion, one hundred billion, ten thousand, one hundred eleven".