142231422423221 has 8 divisors (see below), whose sum is σ = 143786826828120. Its totient is φ = 140683513943808.

The previous prime is 142231422423203. The next prime is 142231422423239. The reversal of 142231422423221 is 122324224132241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (142231422423203) and next prime (142231422423239).

It can be written as a sum of positive squares in 4 ways, for example, as 111882891121 + 142119539532100 = 334489^2 + 11921390^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142231422423221 - 2¹⁰ = 142231422422197 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 (142231422423421) 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 7 ways as a sum of consecutive naturals, for example, 1873943216 + ... + 1874019113.

It is an arithmetic number, because the mean of its divisors is an integer number (17973353353515).

Almost surely, 2^{142231422423221} is an apocalyptic number.

It is an amenable number.

142231422423221 is a deficient number, since it is larger than the sum of its proper divisors (1555404404899).

142231422423221 is a wasteful number, since it uses less digits than its factorization.

142231422423221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3747962743.

The product of its digits is 73728, while the sum is 35.

Adding to 142231422423221 its reverse (122324224132241), we get a palindrome (264555646555462).

The spelling of 142231422423221 in words is "one hundred forty-two trillion, two hundred thirty-one billion, four hundred twenty-two million, four hundred twenty-three thousand, two hundred twenty-one".