1021223220973 has 2 divisors, whose sum is σ = 1021223220974. Its totient is φ = 1021223220972.

The previous prime is 1021223220931. The next prime is 1021223220977. The reversal of 1021223220973 is 3790223221201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 820377628009 + 200845592964 = 905747^2 + 448158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021223220973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021223220977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510611610486 + 510611610487.

It is an arithmetic number, because the mean of its divisors is an integer number (510611610487).

Almost surely, 2^{1021223220973} is an apocalyptic number.

It is an amenable number.

1021223220973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021223220973 is an equidigital number, since it uses as much as digits as its factorization.

1021223220973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 1021223220973 in words is "one trillion, twenty-one billion, two hundred twenty-three million, two hundred twenty thousand, nine hundred seventy-three".