11122111212 has 96 divisors (see below), whose sum is σ = 27995083200. Its totient is φ = 3423928320.

The previous prime is 11122111183. The next prime is 11122111241. The reversal of 11122111212 is 21211122111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11122111183) and next prime (11122111241).

It is a super-2 number, since 2×11122111212² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 11122111191 and 11122111200.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7179414 + ... + 7180962.

It is an arithmetic number, because the mean of its divisors is an integer number (291615450).

Almost surely, 2^11122111212 is an apocalyptic number.

11122111212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11122111212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13997541600).

11122111212 is an abundant number, since it is smaller than the sum of its proper divisors (16872971988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11122111212 is a wasteful number, since it uses less digits than its factorization.

11122111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211 (or 2209 counting only the distinct ones).

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

Adding to 11122111212 its reverse (21211122111), we get a palindrome (32333233323).

It can be divided in two parts, 11122111 and 212, that multiplied together give a palindrome (2357887532).

The spelling of 11122111212 in words is "eleven billion, one hundred twenty-two million, one hundred eleven thousand, two hundred twelve".