1021305433123 has 2 divisors, whose sum is σ = 1021305433124. Its totient is φ = 1021305433122.

The previous prime is 1021305433121. The next prime is 1021305433147. The reversal of 1021305433123 is 3213345031201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021305433123 - 2¹ = 1021305433121 is a prime.

Together with 1021305433121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1021305433091 and 1021305433100.

It is not a weakly prime, because it can be changed into another prime (1021305433121) 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, 510652716561 + 510652716562.

It is an arithmetic number, because the mean of its divisors is an integer number (510652716562).

Almost surely, 2^{1021305433123} is an apocalyptic number.

1021305433123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021305433123 is an equidigital number, since it uses as much as digits as its factorization.

1021305433123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

The spelling of 1021305433123 in words is "one trillion, twenty-one billion, three hundred five million, four hundred thirty-three thousand, one hundred twenty-three".