142121111123 has 8 divisors (see below), whose sum is σ = 142383186288. Its totient is φ = 141859105024.

The previous prime is 142121111057. The next prime is 142121111131. The reversal of 142121111123 is 321111121241.

It is a happy number.

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 142121111123 - 2¹⁶ = 142121045587 is a prime.

It is a super-2 number, since 2×142121111123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142121111095 and 142121111104.

It is not an unprimeable number, because it can be changed into a prime (142121111173) 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, 5971415 + ... + 5995167.

It is an arithmetic number, because the mean of its divisors is an integer number (17797898286).

Almost surely, 2^142121111123 is an apocalyptic number.

142121111123 is a deficient number, since it is larger than the sum of its proper divisors (262075165).

142121111123 is a wasteful number, since it uses less digits than its factorization.

142121111123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34533.

The product of its digits is 96, while the sum is 20.

Adding to 142121111123 its reverse (321111121241), we get a palindrome (463232232364).

The spelling of 142121111123 in words is "one hundred forty-two billion, one hundred twenty-one million, one hundred eleven thousand, one hundred twenty-three".