20101111110103 has 4 divisors (see below), whose sum is σ = 20135354911560. Its totient is φ = 20066867308648.

The previous prime is 20101111110083. The next prime is 20101111110107. The reversal of 20101111110103 is 30101111110102.

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 20101111110103 - 2¹⁷ = 20101110979031 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 (20101111110107) 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, 17121899848 + ... + 17121901021.

It is an arithmetic number, because the mean of its divisors is an integer number (5033838727890).

Almost surely, 2^{20101111110103} is an apocalyptic number.

20101111110103 is a deficient number, since it is larger than the sum of its proper divisors (34243801457).

20101111110103 is an equidigital number, since it uses as much as digits as its factorization.

20101111110103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34243801456.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 20101111110103 its reverse (30101111110102), we get a palindrome (50202222220205).

Subtracting 20101111110103 from its reverse (30101111110102), we obtain a palindrome (9999999999999).

The spelling of 20101111110103 in words is "twenty trillion, one hundred one billion, one hundred eleven million, one hundred ten thousand, one hundred three".