142421421551117 has 2 divisors, whose sum is σ = 142421421551118. Its totient is φ = 142421421551116.

The previous prime is 142421421551113. The next prime is 142421421551131. The reversal of 142421421551117 is 711155124124241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127516061874601 + 14905359676516 = 11292301^2 + 3860746^2 .

It is a cyclic number.

It is not a de Polignac number, because 142421421551117 - 2² = 142421421551113 is a prime.

It is a super-2 number, since 2×142421421551117² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142421421551111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71210710775558 + 71210710775559.

It is an arithmetic number, because the mean of its divisors is an integer number (71210710775559).

Almost surely, 2^{142421421551117} is an apocalyptic number.

It is an amenable number.

142421421551117 is a deficient number, since it is larger than the sum of its proper divisors (1).

142421421551117 is an equidigital number, since it uses as much as digits as its factorization.

142421421551117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 89600, while the sum is 41.

Adding to 142421421551117 its reverse (711155124124241), we get a palindrome (853576545675358).

The spelling of 142421421551117 in words is "one hundred forty-two trillion, four hundred twenty-one billion, four hundred twenty-one million, five hundred fifty-one thousand, one hundred seventeen".