2104321213 has 4 divisors (see below), whose sum is σ = 2104495708. Its totient is φ = 2104146720.

The previous prime is 2104321211. The next prime is 2104321243. The reversal of 2104321213 is 3121234012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 878411044 + 1225910169 = 29638^2 + 35013^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104321213 - 2¹ = 2104321211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2104321211) 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, 67698 + ... + 93763.

It is an arithmetic number, because the mean of its divisors is an integer number (526123927).

Almost surely, 2^2104321213 is an apocalyptic number.

It is an amenable number.

2104321213 is a deficient number, since it is larger than the sum of its proper divisors (174495).

2104321213 is a wasteful number, since it uses less digits than its factorization.

2104321213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174494.

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

The square root of 2104321213 is about 45872.8810191817. The cubic root of 2104321213 is about 1281.4569211933.

Adding to 2104321213 its reverse (3121234012), we get a palindrome (5225555225).

The spelling of 2104321213 in words is "two billion, one hundred four million, three hundred twenty-one thousand, two hundred thirteen".