142121230123 has 4 divisors (see below), whose sum is σ = 142185453408. Its totient is φ = 142057006840.

The previous prime is 142121230061. The next prime is 142121230129. The reversal of 142121230123 is 321032121241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321032121241 = 13 ⋅24694778557.

It is a cyclic number.

It is not a de Polignac number, because 142121230123 - 2⁹ = 142121229611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142121230094 and 142121230103.

It is not an unprimeable number, because it can be changed into a prime (142121230129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32108323 + ... + 32112748.

It is an arithmetic number, because the mean of its divisors is an integer number (35546363352).

Almost surely, 2^142121230123 is an apocalyptic number.

142121230123 is a deficient number, since it is larger than the sum of its proper divisors (64223285).

142121230123 is an equidigital number, since it uses as much as digits as its factorization.

142121230123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64223284.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 142121230123 its reverse (321032121241), we get a palindrome (463153351364).

The spelling of 142121230123 in words is "one hundred forty-two billion, one hundred twenty-one million, two hundred thirty thousand, one hundred twenty-three".