20101102111 has 2 divisors, whose sum is σ = 20101102112. Its totient is φ = 20101102110.

The previous prime is 20101101997. The next prime is 20101102121. The reversal of 20101102111 is 11120110102.

It is an a-pointer prime, because the next prime (20101102121) can be obtained adding 20101102111 to its sum of digits (10).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20101102111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101102121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050551055 + 10050551056.

It is an arithmetic number, because the mean of its divisors is an integer number (10050551056).

Almost surely, 2^20101102111 is an apocalyptic number.

20101102111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101102111 is an equidigital number, since it uses as much as digits as its factorization.

20101102111 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 20101102111 its reverse (11120110102), we get a palindrome (31221212213).

The spelling of 20101102111 in words is "twenty billion, one hundred one million, one hundred two thousand, one hundred eleven".