142340321021 has 4 divisors (see below), whose sum is σ = 142343635452. Its totient is φ = 142337006592.

The previous prime is 142340320957. The next prime is 142340321033. The reversal of 142340321021 is 120123043241.

142340321021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120123043241 = 2383 ⋅50408327.

It can be written as a sum of positive squares in 2 ways, for example, as 968080996 + 141372240025 = 31114^2 + 375995^2 .

It is a cyclic number.

It is not a de Polignac number, because 142340321021 - 2⁶ = 142340320957 is a prime.

It is a super-2 number, since 2×142340321021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142340321621) 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, 1591940 + ... + 1678973.

It is an arithmetic number, because the mean of its divisors is an integer number (35585908863).

Almost surely, 2^142340321021 is an apocalyptic number.

It is an amenable number.

142340321021 is a deficient number, since it is larger than the sum of its proper divisors (3314431).

142340321021 is an equidigital number, since it uses as much as digits as its factorization.

142340321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314430.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 142340321021 its reverse (120123043241), we get a palindrome (262463364262).

The spelling of 142340321021 in words is "one hundred forty-two billion, three hundred forty million, three hundred twenty-one thousand, twenty-one".