20213104340111 has 2 divisors, whose sum is σ = 20213104340112. Its totient is φ = 20213104340110.

The previous prime is 20213104340069. The next prime is 20213104340141. The reversal of 20213104340111 is 11104340131202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20213104340111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20213104340141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106552170055 + 10106552170056.

It is an arithmetic number, because the mean of its divisors is an integer number (10106552170056).

Almost surely, 2^{20213104340111} is an apocalyptic number.

20213104340111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213104340111 is an equidigital number, since it uses as much as digits as its factorization.

20213104340111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 20213104340111 its reverse (11104340131202), we get a palindrome (31317444471313).

The spelling of 20213104340111 in words is "twenty trillion, two hundred thirteen billion, one hundred four million, three hundred forty thousand, one hundred eleven".