142002540021 has 4 divisors (see below), whose sum is σ = 189336720032. Its totient is φ = 94668360012.

The previous prime is 142002539933. The next prime is 142002540049. The reversal of 142002540021 is 120045200241.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120045200241 = 3 ⋅40015066747.

It is not a de Polignac number, because 142002540021 - 2²³ = 141994151413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142002540021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142002540061) 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, 23667090001 + ... + 23667090006.

It is an arithmetic number, because the mean of its divisors is an integer number (47334180008).

Almost surely, 2^142002540021 is an apocalyptic number.

It is an amenable number.

142002540021 is a deficient number, since it is larger than the sum of its proper divisors (47334180011).

142002540021 is an equidigital number, since it uses as much as digits as its factorization.

142002540021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47334180010.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 142002540021 its reverse (120045200241), we get a palindrome (262047740262).

The spelling of 142002540021 in words is "one hundred forty-two billion, two million, five hundred forty thousand, twenty-one".