20011102102111 has 2 divisors, whose sum is σ = 20011102102112. Its totient is φ = 20011102102110.

The previous prime is 20011102102093. The next prime is 20011102102127. The reversal of 20011102102111 is 11120120111002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20011102102111 - 2⁴¹ = 17812078846559 is a prime.

It is a super-2 number, since 2×20011102102111² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20011102102091 and 20011102102100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011102102171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005551051055 + 10005551051056.

It is an arithmetic number, because the mean of its divisors is an integer number (10005551051056).

Almost surely, 2^{20011102102111} is an apocalyptic number.

20011102102111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011102102111 is an equidigital number, since it uses as much as digits as its factorization.

20011102102111 is an evil number, because the sum of its binary digits is even.

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

Adding to 20011102102111 its reverse (11120120111002), we get a palindrome (31131222213113).

The spelling of 20011102102111 in words is "twenty trillion, eleven billion, one hundred two million, one hundred two thousand, one hundred eleven".