2101324021 has 16 divisors (see below), whose sum is σ = 2195726400. Its totient is φ = 2008476288.

The previous prime is 2101324013. The next prime is 2101324033. The reversal of 2101324021 is 1204231012.

It is a cyclic number.

It is not a de Polignac number, because 2101324021 - 2³ = 2101324013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101323986 and 2101324004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101324051) 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, 2204481 + ... + 2205433.

It is an arithmetic number, because the mean of its divisors is an integer number (137232900).

Almost surely, 2^2101324021 is an apocalyptic number.

It is an amenable number.

2101324021 is a deficient number, since it is larger than the sum of its proper divisors (94402379).

2101324021 is a wasteful number, since it uses less digits than its factorization.

2101324021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2101324021 is about 45840.2009266975. The cubic root of 2101324021 is about 1280.8482376063.

Adding to 2101324021 its reverse (1204231012), we get a palindrome (3305555033).

It can be divided in two parts, 210 and 1324021, that added together give a palindrome (1324231).

The spelling of 2101324021 in words is "two billion, one hundred one million, three hundred twenty-four thousand, twenty-one".