142420052021 has 4 divisors (see below), whose sum is σ = 153375440652. Its totient is φ = 131464663392.

The previous prime is 142420051927. The next prime is 142420052069. The reversal of 142420052021 is 120250024241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17765157796 + 124654894225 = 133286^2 + 353065^2 .

It is a cyclic number.

It is not a de Polignac number, because 142420052021 - 2²⁶ = 142352943157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142420052221) 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, 5477694296 + ... + 5477694321.

It is an arithmetic number, because the mean of its divisors is an integer number (38343860163).

Almost surely, 2^142420052021 is an apocalyptic number.

It is an amenable number.

142420052021 is a deficient number, since it is larger than the sum of its proper divisors (10955388631).

142420052021 is a wasteful number, since it uses less digits than its factorization.

142420052021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10955388630.

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 142420052021 its reverse (120250024241), we get a palindrome (262670076262).

The spelling of 142420052021 in words is "one hundred forty-two billion, four hundred twenty million, fifty-two thousand, twenty-one".