2101243321 has 4 divisors (see below), whose sum is σ = 2117788672. Its totient is φ = 2084697972.

The previous prime is 2101243301. The next prime is 2101243327. The reversal of 2101243321 is 1233421012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2101243321 - 2²⁹ = 1564372409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101243327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8272485 + ... + 8272738.

It is an arithmetic number, because the mean of its divisors is an integer number (529447168).

Almost surely, 2^2101243321 is an apocalyptic number.

It is an amenable number.

2101243321 is a deficient number, since it is larger than the sum of its proper divisors (16545351).

2101243321 is a wasteful number, since it uses less digits than its factorization.

2101243321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16545350.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2101243321 is about 45839.3206865023. The cubic root of 2101243321 is about 1280.8318406783.

Adding to 2101243321 its reverse (1233421012), we get a palindrome (3334664333).

The spelling of 2101243321 in words is "two billion, one hundred one million, two hundred forty-three thousand, three hundred twenty-one".