20011000211101 has 2 divisors, whose sum is σ = 20011000211102. Its totient is φ = 20011000211100.

The previous prime is 20011000211093. The next prime is 20011000211117. The reversal of 20011000211101 is 10111200011002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19885365408601 + 125634802500 = 4459301^2 + 354450^2 .

It is a cyclic number.

It is not a de Polignac number, because 20011000211101 - 2³ = 20011000211093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011000211161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005500105550 + 10005500105551.

It is an arithmetic number, because the mean of its divisors is an integer number (10005500105551).

Almost surely, 2^{20011000211101} is an apocalyptic number.

It is an amenable number.

20011000211101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011000211101 is an equidigital number, since it uses as much as digits as its factorization.

20011000211101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20011000211101 its reverse (10111200011002), we get a palindrome (30122200222103).

The spelling of 20011000211101 in words is "twenty trillion, eleven billion, two hundred eleven thousand, one hundred one".