142202121 has 8 divisors (see below), whose sum is σ = 189776160. Its totient is φ = 94714752.

The previous prime is 142202117. The next prime is 142202129. The reversal of 142202121 is 121202241.

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

It is not a de Polignac number, because 142202121 - 2² = 142202117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142202121.

It is not an unprimeable number, because it can be changed into a prime (142202129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17736 + ... + 24473.

It is an arithmetic number, because the mean of its divisors is an integer number (23722020).

Almost surely, 2^142202121 is an apocalyptic number.

It is an amenable number.

142202121 is a deficient number, since it is larger than the sum of its proper divisors (47574039).

142202121 is a wasteful number, since it uses less digits than its factorization.

142202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43335.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 142202121 is about 11924.8530808560. The cubic root of 142202121 is about 521.9577592396.

Adding to 142202121 its reverse (121202241), we get a palindrome (263404362).

The spelling of 142202121 in words is "one hundred forty-two million, two hundred two thousand, one hundred twenty-one".