20102111100101 has 4 divisors (see below), whose sum is σ = 20144077929600. Its totient is φ = 20060144270604.

The previous prime is 20102111100091. The next prime is 20102111100173. The reversal of 20102111100101 is 10100111120102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20102111100101 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 (20102111300101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20983414031 + ... + 20983414988.

It is an arithmetic number, because the mean of its divisors is an integer number (5036019482400).

Almost surely, 2^{20102111100101} is an apocalyptic number.

It is an amenable number.

20102111100101 is a deficient number, since it is larger than the sum of its proper divisors (41966829499).

20102111100101 is an equidigital number, since it uses as much as digits as its factorization.

20102111100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41966829498.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20102111100101 its reverse (10100111120102), we get a palindrome (30202222220203).

The spelling of 20102111100101 in words is "twenty trillion, one hundred two billion, one hundred eleven million, one hundred thousand, one hundred one".