11212221222120 has 64 divisors (see below), whose sum is σ = 33653457529920. Its totient is φ = 2988432871424.

The previous prime is 11212221222119. The next prime is 11212221222157. The reversal of 11212221222120 is 2122212221211.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23083449 + ... + 23564168.

It is an arithmetic number, because the mean of its divisors is an integer number (525835273905).

Almost surely, 2^{11212221222120} is an apocalyptic number.

11212221222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11212221222120 is an abundant number, since it is smaller than the sum of its proper divisors (22441236307800).

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

11212221222120 is a wasteful number, since it uses less digits than its factorization.

11212221222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46649634 (or 46649630 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 11212221222120 its reverse (2122212221211), we get a palindrome (13334433443331).

Subtracting from 11212221222120 its reverse (2122212221211), we obtain a palindrome (9090009000909).

It can be divided in two parts, 1 and 1212221222120, that added together give a palindrome (1212221222121).

The spelling of 11212221222120 in words is "eleven trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty".