142107221 has 8 divisors (see below), whose sum is σ = 147661920. Its totient is φ = 136596208.

The previous prime is 142107209. The next prime is 142107239. The reversal of 142107221 is 122701241.

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 142107221 - 2²² = 137912917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142107193 and 142107202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142107521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4211 + ... + 17376.

It is an arithmetic number, because the mean of its divisors is an integer number (18457740).

Almost surely, 2^142107221 is an apocalyptic number.

It is an amenable number.

142107221 is a deficient number, since it is larger than the sum of its proper divisors (5554699).

142107221 is a wasteful number, since it uses less digits than its factorization.

142107221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21843.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 142107221 is about 11920.8733321011. The cubic root of 142107221 is about 521.8416221664.

Adding to 142107221 its reverse (122701241), we get a palindrome (264808462).

The spelling of 142107221 in words is "one hundred forty-two million, one hundred seven thousand, two hundred twenty-one".