11211011212111 has 16 divisors (see below), whose sum is σ = 11521812619296. Its totient is φ = 10904576400000.

The previous prime is 11211011212087. The next prime is 11211011212123. The reversal of 11211011212111 is 11121211011211.

It is a cyclic number.

It is not a de Polignac number, because 11211011212111 - 2⁹ = 11211011211599 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 (11211011210111) 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, 3874701 + ... + 6118441.

It is an arithmetic number, because the mean of its divisors is an integer number (720113288706).

Almost surely, 2^{11211011212111} is an apocalyptic number.

11211011212111 is a deficient number, since it is larger than the sum of its proper divisors (310801407185).

11211011212111 is a wasteful number, since it uses less digits than its factorization.

11211011212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244714.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 11211011212111 its reverse (11121211011211), we get a palindrome (22332222223322).

The spelling of 11211011212111 in words is "eleven trillion, two hundred eleven billion, eleven million, two hundred twelve thousand, one hundred eleven".