142244430221 has 4 divisors (see below), whose sum is σ = 149730979200. Its totient is φ = 134757881244.

The previous prime is 142244430151. The next prime is 142244430239. The reversal of 142244430221 is 122034442241.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-142244430221 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 (142244430821) 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, 3743274461 + ... + 3743274498.

It is an arithmetic number, because the mean of its divisors is an integer number (37432744800).

Almost surely, 2^142244430221 is an apocalyptic number.

It is an amenable number.

142244430221 is a deficient number, since it is larger than the sum of its proper divisors (7486548979).

142244430221 is an equidigital number, since it uses as much as digits as its factorization.

142244430221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7486548978.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 142244430221 its reverse (122034442241), we get a palindrome (264278872462).

The spelling of 142244430221 in words is "one hundred forty-two billion, two hundred forty-four million, four hundred thirty thousand, two hundred twenty-one".