142342220440021 has 4 divisors (see below), whose sum is σ = 162676823360032. Its totient is φ = 122007617520012.

The previous prime is 142342220439967. The next prime is 142342220440031. The reversal of 142342220440021 is 120044022243241.

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 142342220440021 - 2⁷ = 142342220439893 is a prime.

It is a super-2 number, since 2×142342220440021² (a number of 29 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 (142342220440031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10167301459995 + ... + 10167301460008.

It is an arithmetic number, because the mean of its divisors is an integer number (40669205840008).

Almost surely, 2^{142342220440021} is an apocalyptic number.

It is an amenable number.

142342220440021 is a deficient number, since it is larger than the sum of its proper divisors (20334602920011).

142342220440021 is an equidigital number, since it uses as much as digits as its factorization.

142342220440021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20334602920010.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 142342220440021 its reverse (120044022243241), we get a palindrome (262386242683262).

The spelling of 142342220440021 in words is "one hundred forty-two trillion, three hundred forty-two billion, two hundred twenty million, four hundred forty thousand, twenty-one".