121310103123 has 96 divisors (see below), whose sum is σ = 214028365824. Its totient is φ = 65329920000.

The previous prime is 121310103121. The next prime is 121310103181. The reversal of 121310103123 is 321301013121.

It is not a de Polignac number, because 121310103123 - 2¹ = 121310103121 is a prime.

It is a super-2 number, since 2×121310103123² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121310103096 and 121310103105.

It is not an unprimeable number, because it can be changed into a prime (121310103121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2110738 + ... + 2167448.

It is an arithmetic number, because the mean of its divisors is an integer number (2229462144).

Almost surely, 2^121310103123 is an apocalyptic number.

121310103123 is a deficient number, since it is larger than the sum of its proper divisors (92718262701).

121310103123 is a wasteful number, since it uses less digits than its factorization.

121310103123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56817 (or 56814 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 121310103123 its reverse (321301013121), we get a palindrome (442611116244).

The spelling of 121310103123 in words is "one hundred twenty-one billion, three hundred ten million, one hundred three thousand, one hundred twenty-three".