11212110111 has 16 divisors (see below), whose sum is σ = 15402935808. Its totient is φ = 7249312800.

The previous prime is 11212110103. The next prime is 11212110139. The reversal of 11212110111 is 11101121211.

It is not a de Polignac number, because 11212110111 - 2³ = 11212110103 is a prime.

It is a super-2 number, since 2×11212110111² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212118111) 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, 127875 + ... + 196916.

It is an arithmetic number, because the mean of its divisors is an integer number (962683488).

Almost surely, 2^11212110111 is an apocalyptic number.

11212110111 is a deficient number, since it is larger than the sum of its proper divisors (4190825697).

11212110111 is a wasteful number, since it uses less digits than its factorization.

11212110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325142.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11212110111 its reverse (11101121211), we get a palindrome (22313231322).

The spelling of 11212110111 in words is "eleven billion, two hundred twelve million, one hundred ten thousand, one hundred eleven".