142311024431221 has 4 divisors (see below), whose sum is σ = 142454627887744. Its totient is φ = 142167420974700.

The previous prime is 142311024431207. The next prime is 142311024431231. The reversal of 142311024431221 is 122134420113241.

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 142311024431221 - 2⁹ = 142311024430709 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 (142311024431231) 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, 71801726775 + ... + 71801728756.

It is an arithmetic number, because the mean of its divisors is an integer number (35613656971936).

Almost surely, 2^{142311024431221} is an apocalyptic number.

It is an amenable number.

142311024431221 is a deficient number, since it is larger than the sum of its proper divisors (143603456523).

142311024431221 is an equidigital number, since it uses as much as digits as its factorization.

142311024431221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143603456522.

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 142311024431221 its reverse (122134420113241), we get a palindrome (264445444544462).

The spelling of 142311024431221 in words is "one hundred forty-two trillion, three hundred eleven billion, twenty-four million, four hundred thirty-one thousand, two hundred twenty-one".