21112120012120 has 16 divisors (see below), whose sum is σ = 47502270027360. Its totient is φ = 8444848004832.

The previous prime is 21112120012099. The next prime is 21112120012147. The reversal of 21112120012120 is 2121002121112.

It is a super-2 number, since 2×21112120012120² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21112120012094 and 21112120012103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263901500112 + ... + 263901500191.

It is an arithmetic number, because the mean of its divisors is an integer number (2968891876710).

Almost surely, 2^{21112120012120} is an apocalyptic number.

21112120012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112120012120 is an abundant number, since it is smaller than the sum of its proper divisors (26390150015240).

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

21112120012120 is a wasteful number, since it uses less digits than its factorization.

21112120012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527803000314 (or 527803000310 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21112120012120 its reverse (2121002121112), we get a palindrome (23233122133232).

The spelling of 21112120012120 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty million, twelve thousand, one hundred twenty".