121321113103 has 4 divisors (see below), whose sum is σ = 121498743528. Its totient is φ = 121143482680.

The previous prime is 121321113101. The next prime is 121321113119. The reversal of 121321113103 is 301311123121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301311123121 = 17 ⋅17724183713.

It is a cyclic number.

It is not a de Polignac number, because 121321113103 - 2¹ = 121321113101 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 (121321113101) 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, 88814188 + ... + 88815553.

It is an arithmetic number, because the mean of its divisors is an integer number (30374685882).

Almost surely, 2^121321113103 is an apocalyptic number.

121321113103 is a deficient number, since it is larger than the sum of its proper divisors (177630425).

121321113103 is an equidigital number, since it uses as much as digits as its factorization.

121321113103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177630424.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 121321113103 its reverse (301311123121), we get a palindrome (422632236224).

The spelling of 121321113103 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred thirteen thousand, one hundred three".