142205332221 has 12 divisors (see below), whose sum is σ = 205418721820. Its totient is φ = 94798468800.

The previous prime is 142205332193. The next prime is 142205332253. The reversal of 142205332221 is 122233502241.

It can be written as a sum of positive squares in 2 ways, for example, as 94325765625 + 47879566596 = 307125^2 + 218814^2 .

It is not a de Polignac number, because 142205332221 - 2⁵ = 142205332189 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 (142205432221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 242680 + ... + 585921.

Almost surely, 2^142205332221 is an apocalyptic number.

It is an amenable number.

142205332221 is a deficient number, since it is larger than the sum of its proper divisors (63213389599).

142205332221 is a wasteful number, since it uses less digits than its factorization.

142205332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847676 (or 847673 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 142205332221 its reverse (122233502241), we get a palindrome (264438834462).

The spelling of 142205332221 in words is "one hundred forty-two billion, two hundred five million, three hundred thirty-two thousand, two hundred twenty-one".