11212121112120 has 192 divisors, whose sum is σ = 38737033639200. Its totient is φ = 2804490777600.

The previous prime is 11212121112083. The next prime is 11212121112131. The reversal of 11212121112120 is 2121112121211.

It is a happy number.

It is a super-2 number, since 2×11212121112120² (a number of 27 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 11212121112093 and 11212121112102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7424007 + ... + 8805686.

Almost surely, 2^{11212121112120} is an apocalyptic number.

11212121112120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11212121112120 is an abundant number, since it is smaller than the sum of its proper divisors (27524912527080).

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

11212121112120 is a wasteful number, since it uses less digits than its factorization.

11212121112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16229830 (or 16229823 counting only the distinct ones).

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

Adding to 11212121112120 its reverse (2121112121211), we get a palindrome (13333233233331).

The spelling of 11212121112120 in words is "eleven trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twelve thousand, one hundred twenty".