20112121012120 has 64 divisors (see below), whose sum is σ = 45826328016000. Its totient is φ = 7942799574528.

The previous prime is 20112121012117. The next prime is 20112121012129. The reversal of 20112121012120 is 2121012121102.

It is a junction number, because it is equal to n+sod(n) for n = 20112121012094 and 20112121012103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112121012129) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 168851946 + ... + 168971014.

It is an arithmetic number, because the mean of its divisors is an integer number (716036375250).

Almost surely, 2^{20112121012120} is an apocalyptic number.

20112121012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112121012120 is an abundant number, since it is smaller than the sum of its proper divisors (25714207003880).

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

20112121012120 is a wasteful number, since it uses less digits than its factorization.

20112121012120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172612 (or 172608 counting only the distinct ones).

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

Adding to 20112121012120 its reverse (2121012121102), we get a palindrome (22233133133222).

The spelling of 20112121012120 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-one million, twelve thousand, one hundred twenty".