211111000101101 has 16 divisors (see below), whose sum is σ = 222750662722560. Its totient is φ = 199524247233840.

The previous prime is 211111000101061. The next prime is 211111000101109. The reversal of 211111000101101 is 101101000111112.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211111000101101 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 (211111000101109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141640790 + ... + 143123496.

It is an arithmetic number, because the mean of its divisors is an integer number (13921916420160).

Almost surely, 2^{211111000101101} is an apocalyptic number.

It is an amenable number.

211111000101101 is a deficient number, since it is larger than the sum of its proper divisors (11639662621459).

211111000101101 is a wasteful number, since it uses less digits than its factorization.

211111000101101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500544.

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

Adding to 211111000101101 its reverse (101101000111112), we get a palindrome (312212000212213).

The spelling of 211111000101101 in words is "two hundred eleven trillion, one hundred eleven billion, one hundred one thousand, one hundred one".