2100000221010 has 96 divisors (see below), whose sum is σ = 5608740861360. Its totient is φ = 544750977024.

The previous prime is 2100000220949. The next prime is 2100000221023. The reversal of 2100000221010 is 101220000012.

It can be written as a sum of positive squares in 8 ways, for example, as 1561242753009 + 538757468001 = 1249497^2 + 734001^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2100000220983 and 2100000221001.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16483314 + ... + 16610226.

Almost surely, 2^{2100000221010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2100000221010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2804370430680).

2100000221010 is an abundant number, since it is smaller than the sum of its proper divisors (3508740640350).

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

2100000221010 is a wasteful number, since it uses less digits than its factorization.

2100000221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131932 (or 131929 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 2100000221010 its reverse (101220000012), we get a palindrome (2201220221022).

The spelling of 2100000221010 in words is "two trillion, one hundred billion, two hundred twenty-one thousand, ten".