121003231111111 has 4 divisors (see below), whose sum is σ = 128121068235312. Its totient is φ = 113885393986912.

The previous prime is 121003231111073. The next prime is 121003231111127. The reversal of 121003231111111 is 111111132300121.

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 121003231111111 - 2²⁷ = 121003096893383 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 (121003231112111) 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, 3558918562075 + ... + 3558918562108.

It is an arithmetic number, because the mean of its divisors is an integer number (32030267058828).

Almost surely, 2^{121003231111111} is an apocalyptic number.

121003231111111 is a deficient number, since it is larger than the sum of its proper divisors (7117837124201).

121003231111111 is an equidigital number, since it uses as much as digits as its factorization.

121003231111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7117837124200.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 121003231111111 its reverse (111111132300121), we get a palindrome (232114363411232).

The spelling of 121003231111111 in words is "one hundred twenty-one trillion, three billion, two hundred thirty-one million, one hundred eleven thousand, one hundred eleven".