121230223123 has 4 divisors (see below), whose sum is σ = 121244116888. Its totient is φ = 121216329360.

The previous prime is 121230223117. The next prime is 121230223199. The reversal of 121230223123 is 321322032121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321322032121 = 24691 ⋅13013731.

It is a cyclic number.

It is not a de Polignac number, because 121230223123 - 2⁵ = 121230223091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121230223094 and 121230223103.

It is not an unprimeable number, because it can be changed into a prime (121230223423) 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 3 ways as a sum of consecutive naturals, for example, 6933786 + ... + 6951247.

It is an arithmetic number, because the mean of its divisors is an integer number (30311029222).

Almost surely, 2^121230223123 is an apocalyptic number.

121230223123 is a deficient number, since it is larger than the sum of its proper divisors (13893765).

121230223123 is an equidigital number, since it uses as much as digits as its factorization.

121230223123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13893764.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 121230223123 its reverse (321322032121), we get a palindrome (442552255244).

The spelling of 121230223123 in words is "one hundred twenty-one billion, two hundred thirty million, two hundred twenty-three thousand, one hundred twenty-three".