142024231221 has 4 divisors (see below), whose sum is σ = 189365641632. Its totient is φ = 94682820812.

The previous prime is 142024231213. The next prime is 142024231249. The reversal of 142024231221 is 122132420241.

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 142024231221 - 2³ = 142024231213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142024231191 and 142024231200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142024232221) 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, 23670705201 + ... + 23670705206.

It is an arithmetic number, because the mean of its divisors is an integer number (47341410408).

Almost surely, 2^142024231221 is an apocalyptic number.

It is an amenable number.

142024231221 is a deficient number, since it is larger than the sum of its proper divisors (47341410411).

142024231221 is an equidigital number, since it uses as much as digits as its factorization.

142024231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47341410410.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 142024231221 its reverse (122132420241), we get a palindrome (264156651462).

The spelling of 142024231221 in words is "one hundred forty-two billion, twenty-four million, two hundred thirty-one thousand, two hundred twenty-one".