20011011202111 has 2 divisors, whose sum is σ = 20011011202112. Its totient is φ = 20011011202110.

The previous prime is 20011011202103. The next prime is 20011011202139. The reversal of 20011011202111 is 11120211011002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20011011202111 - 2³ = 20011011202103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20011011202091 and 20011011202100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011011206111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005505601055 + 10005505601056.

It is an arithmetic number, because the mean of its divisors is an integer number (10005505601056).

Almost surely, 2^{20011011202111} is an apocalyptic number.

20011011202111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011011202111 is an equidigital number, since it uses as much as digits as its factorization.

20011011202111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20011011202111 its reverse (11120211011002), we get a palindrome (31131222213113).

The spelling of 20011011202111 in words is "twenty trillion, eleven billion, eleven million, two hundred two thousand, one hundred eleven".