11212100120 has 64 divisors (see below), whose sum is σ = 27613232640. Its totient is φ = 4071974400.

The previous prime is 11212100101. The next prime is 11212100143. The reversal of 11212100120 is 2100121211.

It is a super-2 number, since 2×11212100120² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145016 + ... + 208455.

It is an arithmetic number, because the mean of its divisors is an integer number (431456760).

Almost surely, 2^11212100120 is an apocalyptic number.

11212100120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11212100120 is an abundant number, since it is smaller than the sum of its proper divisors (16401132520).

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

11212100120 is a wasteful number, since it uses less digits than its factorization.

11212100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353556 (or 353552 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11212100120 its reverse (2100121211), we get a palindrome (13312221331).

The spelling of 11212100120 in words is "eleven billion, two hundred twelve million, one hundred thousand, one hundred twenty".