121100102111 has 16 divisors (see below), whose sum is σ = 125610689088. Its totient is φ = 116685004800.

The previous prime is 121100102083. The next prime is 121100102131. The reversal of 121100102111 is 111201001121.

It is a cyclic number.

It is not a de Polignac number, because 121100102111 - 2³⁰ = 120026360287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121100102092 and 121100102101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100102131) 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, 904481 + ... + 1029701.

It is an arithmetic number, because the mean of its divisors is an integer number (7850668068).

Almost surely, 2^121100102111 is an apocalyptic number.

121100102111 is a deficient number, since it is larger than the sum of its proper divisors (4510586977).

121100102111 is a wasteful number, since it uses less digits than its factorization.

121100102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125602.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121100102111 its reverse (111201001121), we get a palindrome (232301103232).

The spelling of 121100102111 in words is "one hundred twenty-one billion, one hundred million, one hundred two thousand, one hundred eleven".