121212341123 has 8 divisors (see below), whose sum is σ = 121625387520. Its totient is φ = 120799444680.

The previous prime is 121212341111. The next prime is 121212341149. The reversal of 121212341123 is 321143212121.

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

It is a cyclic number.

It is not a de Polignac number, because 121212341123 - 2²² = 121208146819 is a prime.

It is a super-2 number, since 2×121212341123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121212341153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1721708 + ... + 1790726.

It is an arithmetic number, because the mean of its divisors is an integer number (15203173440).

Almost surely, 2^121212341123 is an apocalyptic number.

121212341123 is a deficient number, since it is larger than the sum of its proper divisors (413046397).

121212341123 is an equidigital number, since it uses as much as digits as its factorization.

121212341123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74977.

The product of its digits is 576, while the sum is 23.

Adding to 121212341123 its reverse (321143212121), we get a palindrome (442355553244).

The spelling of 121212341123 in words is "one hundred twenty-one billion, two hundred twelve million, three hundred forty-one thousand, one hundred twenty-three".