2101021120 has 112 divisors (see below), whose sum is σ = 5472684000. Its totient is φ = 761937920.

The previous prime is 2101021073. The next prime is 2101021127. The reversal of 2101021120 is 211201012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2101021097 and 2101021106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101021127) 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, 2002356 + ... + 2003404.

It is an arithmetic number, because the mean of its divisors is an integer number (48863250).

Almost surely, 2^2101021120 is an apocalyptic number.

2101021120 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 2101021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2736342000).

2101021120 is an abundant number, since it is smaller than the sum of its proper divisors (3371662880).

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

2101021120 is a wasteful number, since it uses less digits than its factorization.

2101021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646 (or 1636 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2101021120 is about 45836.8969281299. The cubic root of 2101021120 is about 1280.7866908781.

Adding to 2101021120 its reverse (211201012), we get a palindrome (2312222132).

The spelling of 2101021120 in words is "two billion, one hundred one million, twenty-one thousand, one hundred twenty".