142642531302221 has 16 divisors (see below), whose sum is σ = 150796154981376. Its totient is φ = 134749423200000.

The previous prime is 142642531302199. The next prime is 142642531302239. The reversal of 142642531302221 is 122203135246241.

It is a de Polignac number, because none of the positive numbers 2^k-142642531302221 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 (142642531332221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320609660 + ... + 321054261.

It is an arithmetic number, because the mean of its divisors is an integer number (9424759686336).

Almost surely, 2^{142642531302221} is an apocalyptic number.

It is an amenable number.

142642531302221 is a deficient number, since it is larger than the sum of its proper divisors (8153623679155).

142642531302221 is a wasteful number, since it uses less digits than its factorization.

142642531302221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641664124.

The product of its (nonzero) digits is 138240, while the sum is 38.

Adding to 142642531302221 its reverse (122203135246241), we get a palindrome (264845666548462).

The spelling of 142642531302221 in words is "one hundred forty-two trillion, six hundred forty-two billion, five hundred thirty-one million, three hundred two thousand, two hundred twenty-one".