11121221110212 has 120 divisors (see below), whose sum is σ = 29171829893976. Its totient is φ = 3694486505472.

The previous prime is 11121221110177. The next prime is 11121221110213. The reversal of 11121221110212 is 21201112212111.

It is a happy number.

11121221110212 is a `hidden beast` number, since 1 + 1 + 121 + 221 + 110 + 212 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 446991193476 + 10674229916736 = 668574^2 + 3267144^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (11121221110213) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 529243818 + ... + 529264830.

Almost surely, 2^{11121221110212} is an apocalyptic number.

11121221110212 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 11121221110212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14585914946988).

11121221110212 is an abundant number, since it is smaller than the sum of its proper divisors (18050608783764).

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

11121221110212 is a wasteful number, since it uses less digits than its factorization.

11121221110212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26499 (or 26488 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11121221110212 its reverse (21201112212111), we get a palindrome (32322333322323).

The spelling of 11121221110212 in words is "eleven trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred ten thousand, two hundred twelve".