11212122111 has 8 divisors (see below), whose sum is σ = 15057047040. Its totient is φ = 7420972632.

The previous prime is 11212122079. The next prime is 11212122137. The reversal of 11212122111 is 11122121211.

It is a happy number.

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

It is not a de Polignac number, because 11212122111 - 2⁵ = 11212122079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212122151) 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, 13443375 + ... + 13444208.

It is an arithmetic number, because the mean of its divisors is an integer number (1882130880).

Almost surely, 2^11212122111 is an apocalyptic number.

11212122111 is a deficient number, since it is larger than the sum of its proper divisors (3844924929).

11212122111 is a wasteful number, since it uses less digits than its factorization.

11212122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26887725.

The product of its digits is 16, while the sum is 15.

Adding to 11212122111 its reverse (11122121211), we get a palindrome (22334243322).

The spelling of 11212122111 in words is "eleven billion, two hundred twelve million, one hundred twenty-two thousand, one hundred eleven".