20011101219913 has 2 divisors, whose sum is σ = 20011101219914. Its totient is φ = 20011101219912.

The previous prime is 20011101219911. The next prime is 20011101219919. The reversal of 20011101219913 is 31991210111002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19692719771904 + 318381448009 = 4437648^2 + 564253^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011101219913 - 2¹ = 20011101219911 is a prime.

Together with 20011101219911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20011101219911) 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, 10005550609956 + 10005550609957.

It is an arithmetic number, because the mean of its divisors is an integer number (10005550609957).

Almost surely, 2^{20011101219913} is an apocalyptic number.

It is an amenable number.

20011101219913 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011101219913 is an equidigital number, since it uses as much as digits as its factorization.

20011101219913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 31.

The spelling of 20011101219913 in words is "twenty trillion, eleven billion, one hundred one million, two hundred nineteen thousand, nine hundred thirteen".