1020021222173 has 2 divisors, whose sum is σ = 1020021222174. Its totient is φ = 1020021222172.

The previous prime is 1020021222089. The next prime is 1020021222257. The reversal of 1020021222173 is 3712221200201.

It is a balanced prime because it is at equal distance from previous prime (1020021222089) and next prime (1020021222257).

It can be written as a sum of positive squares in only one way, i.e., 811905519364 + 208115702809 = 901058^2 + 456197^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020021222173 - 2¹⁸ = 1020020960029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020021222673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510010611086 + 510010611087.

It is an arithmetic number, because the mean of its divisors is an integer number (510010611087).

Almost surely, 2^{1020021222173} is an apocalyptic number.

It is an amenable number.

1020021222173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020021222173 is an equidigital number, since it uses as much as digits as its factorization.

1020021222173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 1020021222173 its reverse (3712221200201), we get a palindrome (4732242422374).

The spelling of 1020021222173 in words is "one trillion, twenty billion, twenty-one million, two hundred twenty-two thousand, one hundred seventy-three".