142356421121 has 4 divisors (see below), whose sum is σ = 142518007044. Its totient is φ = 142194835200.

The previous prime is 142356421013. The next prime is 142356421147. The reversal of 142356421121 is 121124653241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121124653241 = 19219 ⋅6302339.

It can be written as a sum of positive squares in 2 ways, for example, as 70150819600 + 72205601521 = 264860^2 + 268711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142356421121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142356427121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80791640 + ... + 80793401.

It is an arithmetic number, because the mean of its divisors is an integer number (35629501761).

Almost surely, 2^142356421121 is an apocalyptic number.

It is an amenable number.

142356421121 is a deficient number, since it is larger than the sum of its proper divisors (161585923).

142356421121 is an equidigital number, since it uses as much as digits as its factorization.

142356421121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161585922.

The product of its digits is 11520, while the sum is 32.

The spelling of 142356421121 in words is "one hundred forty-two billion, three hundred fifty-six million, four hundred twenty-one thousand, one hundred twenty-one".