121100122012111 has 4 divisors (see below), whose sum is σ = 132109224013224. Its totient is φ = 110091020011000.

The previous prime is 121100122012073. The next prime is 121100122012139. The reversal of 121100122012111 is 111210221001121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121100122012111 - 2¹³ = 121100122003919 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 (121100122012811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5504551000540 + ... + 5504551000561.

It is an arithmetic number, because the mean of its divisors is an integer number (33027306003306).

Almost surely, 2^{121100122012111} is an apocalyptic number.

121100122012111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121100122012111 is a deficient number, since it is larger than the sum of its proper divisors (11009102001113).

121100122012111 is a wasteful number, since it uses less digits than its factorization.

121100122012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11009102001112.

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

Adding to 121100122012111 its reverse (111210221001121), we get a palindrome (232310343013232).

The spelling of 121100122012111 in words is "one hundred twenty-one trillion, one hundred billion, one hundred twenty-two million, twelve thousand, one hundred eleven".