20201321102213 has 2 divisors, whose sum is σ = 20201321102214. Its totient is φ = 20201321102212.

The previous prime is 20201321102201. The next prime is 20201321102231. The reversal of 20201321102213 is 31220112310202.

Together with next prime (20201321102231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19947674903524 + 253646198689 = 4466282^2 + 503633^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201321102213 - 2⁸ = 20201321101957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201321102233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100660551106 + 10100660551107.

It is an arithmetic number, because the mean of its divisors is an integer number (10100660551107).

Almost surely, 2^{20201321102213} is an apocalyptic number.

It is an amenable number.

20201321102213 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201321102213 is an equidigital number, since it uses as much as digits as its factorization.

20201321102213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20201321102213 its reverse (31220112310202), we get a palindrome (51421433412415).

The spelling of 20201321102213 in words is "twenty trillion, two hundred one billion, three hundred twenty-one million, one hundred two thousand, two hundred thirteen".