143121032281 has 2 divisors, whose sum is σ = 143121032282. Its totient is φ = 143121032280.

The previous prime is 143121032227. The next prime is 143121032381. The reversal of 143121032281 is 182230121341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142990615881 + 130416400 = 378141^2 + 11420^2 .

It is a cyclic number.

It is not a de Polignac number, because 143121032281 - 2¹³ = 143121024089 is a prime.

It is a super-2 number, since 2×143121032281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (143121032381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71560516140 + 71560516141.

It is an arithmetic number, because the mean of its divisors is an integer number (71560516141).

Almost surely, 2^143121032281 is an apocalyptic number.

It is an amenable number.

143121032281 is a deficient number, since it is larger than the sum of its proper divisors (1).

143121032281 is an equidigital number, since it uses as much as digits as its factorization.

143121032281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 143121032281 in words is "one hundred forty-three billion, one hundred twenty-one million, thirty-two thousand, two hundred eighty-one".