121103342131111 has 4 divisors (see below), whose sum is σ = 122762292023392. Its totient is φ = 119444392238832.

The previous prime is 121103342131067. The next prime is 121103342131127. The reversal of 121103342131111 is 111131243301121.

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 121103342131111 - 2²¹ = 121103340033959 is a prime.

It is a super-2 number, since 2×121103342131111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121103342131141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829474946031 + ... + 829474946176.

It is an arithmetic number, because the mean of its divisors is an integer number (30690573005848).

Almost surely, 2^{121103342131111} is an apocalyptic number.

121103342131111 is a deficient number, since it is larger than the sum of its proper divisors (1658949892281).

121103342131111 is an equidigital number, since it uses as much as digits as its factorization.

121103342131111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658949892280.

The product of its (nonzero) digits is 432, while the sum is 25.

Adding to 121103342131111 its reverse (111131243301121), we get a palindrome (232234585432232).

The spelling of 121103342131111 in words is "one hundred twenty-one trillion, one hundred three billion, three hundred forty-two million, one hundred thirty-one thousand, one hundred eleven".