121121123113 has 4 divisors (see below), whose sum is σ = 121121853840. Its totient is φ = 121120392388.

The previous prime is 121121123089. The next prime is 121121123159. The reversal of 121121123113 is 311321121121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 311321121121 = 273629 ⋅1137749.

It is a cyclic number.

It is not a de Polignac number, because 121121123113 - 2²⁵ = 121087568681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121123173) 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, 15858 + ... + 492436.

It is an arithmetic number, because the mean of its divisors is an integer number (30280463460).

Almost surely, 2^121121123113 is an apocalyptic number.

It is an amenable number.

121121123113 is a deficient number, since it is larger than the sum of its proper divisors (730727).

121121123113 is an equidigital number, since it uses as much as digits as its factorization.

121121123113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730726.

The product of its digits is 72, while the sum is 19.

Adding to 121121123113 its reverse (311321121121), we get a palindrome (432442244234).

The spelling of 121121123113 in words is "one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-three thousand, one hundred thirteen".