121312030123 has 8 divisors (see below), whose sum is σ = 124667904816. Its totient is φ = 117975062400.

The previous prime is 121312030097. The next prime is 121312030163. The reversal of 121312030123 is 321030213121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121312030123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121312030123.

It is not an unprimeable number, because it can be changed into a prime (121312030163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4713733 + ... + 4739398.

It is an arithmetic number, because the mean of its divisors is an integer number (15583488102).

Almost surely, 2^121312030123 is an apocalyptic number.

121312030123 is a deficient number, since it is larger than the sum of its proper divisors (3355874693).

121312030123 is an equidigital number, since it uses as much as digits as its factorization.

121312030123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9453485.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 121312030123 its reverse (321030213121), we get a palindrome (442342243244).

The spelling of 121312030123 in words is "one hundred twenty-one billion, three hundred twelve million, thirty thousand, one hundred twenty-three".