20110021200120 has 64 divisors (see below), whose sum is σ = 60452935597440. Its totient is φ = 5351750364800.

The previous prime is 20110021200107. The next prime is 20110021200127. The reversal of 20110021200120 is 2100212001102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20110021200096 and 20110021200105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110021200127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170596386 + ... + 170714225.

It is an arithmetic number, because the mean of its divisors is an integer number (944577118710).

Almost surely, 2^{20110021200120} is an apocalyptic number.

20110021200120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110021200120 is an abundant number, since it is smaller than the sum of its proper divisors (40342914397320).

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

20110021200120 is a wasteful number, since it uses less digits than its factorization.

20110021200120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341311116 (or 341311112 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20110021200120 its reverse (2100212001102), we get a palindrome (22210233201222).

The spelling of 20110021200120 in words is "twenty trillion, one hundred ten billion, twenty-one million, two hundred thousand, one hundred twenty".