121113031220123 has 16 divisors (see below), whose sum is σ = 128997369446400. Its totient is φ = 113381240322240.

The previous prime is 121113031220053. The next prime is 121113031220141. The reversal of 121113031220123 is 321022130311121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121113031220123 - 2¹² = 121113031216027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121113031220183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18721883 + ... + 24346148.

It is an arithmetic number, because the mean of its divisors is an integer number (8062335590400).

Almost surely, 2^{121113031220123} is an apocalyptic number.

121113031220123 is a deficient number, since it is larger than the sum of its proper divisors (7884338226277).

121113031220123 is a wasteful number, since it uses less digits than its factorization.

121113031220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43069802.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 121113031220123 its reverse (321022130311121), we get a palindrome (442135161531244).

The spelling of 121113031220123 in words is "one hundred twenty-one trillion, one hundred thirteen billion, thirty-one million, two hundred twenty thousand, one hundred twenty-three".