210120122111020 has 72 divisors (see below), whose sum is σ = 483162251867568. Its totient is φ = 76123269292800.

The previous prime is 210120122110981. The next prime is 210120122111063. The reversal of 210120122111020 is 20111221021012.

It is a junction number, because it is equal to n+sod(n) for n = 210120122110985 and 210120122111003.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9319930 + ... + 22518910.

It is an arithmetic number, because the mean of its divisors is an integer number (6710586831494).

Almost surely, 2^{210120122111020} is an apocalyptic number.

210120122111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210120122111020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241581125933784).

210120122111020 is an abundant number, since it is smaller than the sum of its proper divisors (273042129756548).

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

210120122111020 is a wasteful number, since it uses less digits than its factorization.

210120122111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13199539 (or 13199268 counting only the distinct ones).

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

Adding to 210120122111020 its reverse (20111221021012), we get a palindrome (230231343132032).

The spelling of 210120122111020 in words is "two hundred ten trillion, one hundred twenty billion, one hundred twenty-two million, one hundred eleven thousand, twenty".