142042231021 has 4 divisors (see below), whose sum is σ = 142213987872. Its totient is φ = 141870474172.

The previous prime is 142042231007. The next prime is 142042231031. The reversal of 142042231021 is 120132240241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142042231021 - 2⁷ = 142042230893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142042230983 and 142042231001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142042231031) 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, 85877185 + ... + 85878838.

It is an arithmetic number, because the mean of its divisors is an integer number (35553496968).

Almost surely, 2^142042231021 is an apocalyptic number.

It is an amenable number.

142042231021 is a deficient number, since it is larger than the sum of its proper divisors (171756851).

142042231021 is an equidigital number, since it uses as much as digits as its factorization.

142042231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171756850.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 142042231021 its reverse (120132240241), we get a palindrome (262174471262).

The spelling of 142042231021 in words is "one hundred forty-two billion, forty-two million, two hundred thirty-one thousand, twenty-one".