142117018071221 has 2 divisors, whose sum is σ = 142117018071222. Its totient is φ = 142117018071220.

The previous prime is 142117018071181. The next prime is 142117018071331. The reversal of 142117018071221 is 122170810711241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86558629008721 + 55558389062500 = 9303689^2 + 7453750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142117018071221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142117018571221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71058509035610 + 71058509035611.

It is an arithmetic number, because the mean of its divisors is an integer number (71058509035611).

Almost surely, 2^{142117018071221} is an apocalyptic number.

It is an amenable number.

142117018071221 is a deficient number, since it is larger than the sum of its proper divisors (1).

142117018071221 is an equidigital number, since it uses as much as digits as its factorization.

142117018071221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12544, while the sum is 38.

Adding to 142117018071221 its reverse (122170810711241), we get a palindrome (264287828782462).

The spelling of 142117018071221 in words is "one hundred forty-two trillion, one hundred seventeen billion, eighteen million, seventy-one thousand, two hundred twenty-one".