2100621072 has 80 divisors (see below), whose sum is σ = 5959886400. Its totient is φ = 632256000.

The previous prime is 2100621043. The next prime is 2100621097. The reversal of 2100621072 is 2701260012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65322 + ... + 92022.

It is an arithmetic number, because the mean of its divisors is an integer number (74498580).

Almost surely, 2^2100621072 is an apocalyptic number.

2100621072 is a gapful number since it is divisible by the number (22) 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 2100621072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2979943200).

2100621072 is an abundant number, since it is smaller than the sum of its proper divisors (3859265328).

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

2100621072 is a wasteful number, since it uses less digits than its factorization.

2100621072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26872 (or 26866 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 2100621072 is about 45832.5328996773. The cubic root of 2100621072 is about 1280.7053956970.

Adding to 2100621072 its reverse (2701260012), we get a palindrome (4801881084).

The spelling of 2100621072 in words is "two billion, one hundred million, six hundred twenty-one thousand, seventy-two".