2021023081673 has 2 divisors, whose sum is σ = 2021023081674. Its totient is φ = 2021023081672.

The previous prime is 2021023081643. The next prime is 2021023081681. The reversal of 2021023081673 is 3761803201202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1948681986304 + 72341095369 = 1395952^2 + 268963^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021023081673 - 2⁸ = 2021023081417 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021023081603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010511540836 + 1010511540837.

It is an arithmetic number, because the mean of its divisors is an integer number (1010511540837).

Almost surely, 2^{2021023081673} is an apocalyptic number.

It is an amenable number.

2021023081673 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021023081673 is an equidigital number, since it uses as much as digits as its factorization.

2021023081673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

Adding to 2021023081673 its reverse (3761803201202), we get a palindrome (5782826282875).

The spelling of 2021023081673 in words is "two trillion, twenty-one billion, twenty-three million, eighty-one thousand, six hundred seventy-three".