201021000231013 has 2 divisors, whose sum is σ = 201021000231014. Its totient is φ = 201021000231012.

The previous prime is 201021000231011. The next prime is 201021000231017. The reversal of 201021000231013 is 310132000120102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103078170118564 + 97942830112449 = 10152742^2 + 9896607^2 .

It is a cyclic number.

It is not a de Polignac number, because 201021000231013 - 2¹ = 201021000231011 is a prime.

Together with 201021000231011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201021000231011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510500115506 + 100510500115507.

It is an arithmetic number, because the mean of its divisors is an integer number (100510500115507).

Almost surely, 2^{201021000231013} is an apocalyptic number.

It is an amenable number.

201021000231013 is a deficient number, since it is larger than the sum of its proper divisors (1).

201021000231013 is an equidigital number, since it uses as much as digits as its factorization.

201021000231013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 201021000231013 its reverse (310132000120102), we get a palindrome (511153000351115).

The spelling of 201021000231013 in words is "two hundred one trillion, twenty-one billion, two hundred thirty-one thousand, thirteen".