2100021011 has 8 divisors (see below), whose sum is σ = 2295843264. Its totient is φ = 1905017320.

The previous prime is 2100020983. The next prime is 2100021013. The reversal of 2100021011 is 1101200012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2100021011 - 2⁶ = 2100020947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2100021011.

It is not an unprimeable number, because it can be changed into a prime (2100021013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199265 + ... + 209538.

It is an arithmetic number, because the mean of its divisors is an integer number (286980408).

Almost surely, 2^2100021011 is an apocalyptic number.

2100021011 is a deficient number, since it is larger than the sum of its proper divisors (195822253).

2100021011 is a wasteful number, since it uses less digits than its factorization.

2100021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409281.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 2100021011 is about 45825.9861977896. The cubic root of 2100021011 is about 1280.5834358064.

Adding to 2100021011 its reverse (1101200012), we get a palindrome (3201221023).

The spelling of 2100021011 in words is "two billion, one hundred million, twenty-one thousand, eleven".