142204120021 has 4 divisors (see below), whose sum is σ = 148386907872. Its totient is φ = 136021332172.

The previous prime is 142204120007. The next prime is 142204120103. The reversal of 142204120021 is 120021402241.

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 not a de Polignac number, because 142204120021 - 2⁹ = 142204119509 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 (142204120321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3091393891 + ... + 3091393936.

It is an arithmetic number, because the mean of its divisors is an integer number (37096726968).

Almost surely, 2^142204120021 is an apocalyptic number.

It is an amenable number.

142204120021 is a deficient number, since it is larger than the sum of its proper divisors (6182787851).

142204120021 is an equidigital number, since it uses as much as digits as its factorization.

142204120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6182787850.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 142204120021 its reverse (120021402241), we get a palindrome (262225522262).

The spelling of 142204120021 in words is "one hundred forty-two billion, two hundred four million, one hundred twenty thousand, twenty-one".