20221313011997 has 2 divisors, whose sum is σ = 20221313011998. Its totient is φ = 20221313011996.

The previous prime is 20221313011987. The next prime is 20221313012011. The reversal of 20221313011997 is 79911031312202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12943776280516 + 7277536731481 = 3597746^2 + 2697691^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221313011997 - 2⁸ = 20221313011741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20221313011987) 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, 10110656505998 + 10110656505999.

It is an arithmetic number, because the mean of its divisors is an integer number (10110656505999).

Almost surely, 2^{20221313011997} is an apocalyptic number.

It is an amenable number.

20221313011997 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221313011997 is an equidigital number, since it uses as much as digits as its factorization.

20221313011997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 20221313011997 in words is "twenty trillion, two hundred twenty-one billion, three hundred thirteen million, eleven thousand, nine hundred ninety-seven".