20211210612013 has 2 divisors, whose sum is σ = 20211210612014. Its totient is φ = 20211210612012.

The previous prime is 20211210612007. The next prime is 20211210612071. The reversal of 20211210612013 is 31021601211202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20122599015684 + 88611596329 = 4485822^2 + 297677^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211210612013 - 2²⁹ = 20210673741101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211210112013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105605306006 + 10105605306007.

It is an arithmetic number, because the mean of its divisors is an integer number (10105605306007).

Almost surely, 2^{20211210612013} is an apocalyptic number.

It is an amenable number.

20211210612013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211210612013 is an equidigital number, since it uses as much as digits as its factorization.

20211210612013 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 22.

Adding to 20211210612013 its reverse (31021601211202), we get a palindrome (51232811823215).

The spelling of 20211210612013 in words is "twenty trillion, two hundred eleven billion, two hundred ten million, six hundred twelve thousand, thirteen".