1023143421281 has 2 divisors, whose sum is σ = 1023143421282. Its totient is φ = 1023143421280.

The previous prime is 1023143421277. The next prime is 1023143421301. The reversal of 1023143421281 is 1821243413201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 990590240656 + 32553180625 = 995284^2 + 180425^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023143421281 - 2² = 1023143421277 is a prime.

It is a super-2 number, since 2×1023143421281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1023143421211) 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, 511571710640 + 511571710641.

It is an arithmetic number, because the mean of its divisors is an integer number (511571710641).

Almost surely, 2^{1023143421281} is an apocalyptic number.

It is an amenable number.

1023143421281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023143421281 is an equidigital number, since it uses as much as digits as its factorization.

1023143421281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 32.

Adding to 1023143421281 its reverse (1821243413201), we get a palindrome (2844386834482).

The spelling of 1023143421281 in words is "one trillion, twenty-three billion, one hundred forty-three million, four hundred twenty-one thousand, two hundred eighty-one".