20102110121111 has 4 divisors (see below), whose sum is σ = 20102122940592. Its totient is φ = 20102097301632.

The previous prime is 20102110121101. The next prime is 20102110121173. The reversal of 20102110121111 is 11112101120102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20102110121111 - 2¹⁰ = 20102110120087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102110121101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3666155 + ... + 7324268.

It is an arithmetic number, because the mean of its divisors is an integer number (5025530735148).

Almost surely, 2^{20102110121111} is an apocalyptic number.

20102110121111 is a deficient number, since it is larger than the sum of its proper divisors (12819481).

20102110121111 is a wasteful number, since it uses less digits than its factorization.

20102110121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12819480.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 20102110121111 its reverse (11112101120102), we get a palindrome (31214211241213).

The spelling of 20102110121111 in words is "twenty trillion, one hundred two billion, one hundred ten million, one hundred twenty-one thousand, one hundred eleven".