20111010110111 has 8 divisors (see below), whose sum is σ = 20117272647648. Its totient is φ = 20104747884000.

The previous prime is 20111010110101. The next prime is 20111010110143. The reversal of 20111010110111 is 11101101011102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20111010110111 - 2¹⁸ = 20111009847967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20111010110092 and 20111010110101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111010110101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239201021 + ... + 239285081.

It is an arithmetic number, because the mean of its divisors is an integer number (2514659080956).

Almost surely, 2^{20111010110111} is an apocalyptic number.

20111010110111 is a deficient number, since it is larger than the sum of its proper divisors (6262537537).

20111010110111 is an equidigital number, since it uses as much as digits as its factorization.

20111010110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155713.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 20111010110111 its reverse (11101101011102), we get a palindrome (31212111121213).

Subtracting from 20111010110111 its reverse (11101101011102), we obtain a palindrome (9009909099009).

The spelling of 20111010110111 in words is "twenty trillion, one hundred eleven billion, ten million, one hundred ten thousand, one hundred eleven".