20110111100087 has 2 divisors, whose sum is σ = 20110111100088. Its totient is φ = 20110111100086.

The previous prime is 20110111100077. The next prime is 20110111100153. The reversal of 20110111100087 is 78000111101102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20110111100087 - 2¹⁴ = 20110111083703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110111100077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055055550043 + 10055055550044.

It is an arithmetic number, because the mean of its divisors is an integer number (10055055550044).

Almost surely, 2^{20110111100087} is an apocalyptic number.

20110111100087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110111100087 is an equidigital number, since it uses as much as digits as its factorization.

20110111100087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 23.

Adding to 20110111100087 its reverse (78000111101102), we get a palindrome (98110222201189).

The spelling of 20110111100087 in words is "twenty trillion, one hundred ten billion, one hundred eleven million, one hundred thousand, eighty-seven".