2021213304 has 64 divisors (see below), whose sum is σ = 6124896000. Its totient is φ = 612488160.

The previous prime is 2021213287. The next prime is 2021213309. The reversal of 2021213304 is 4033121202.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021213309) 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, 422964 + ... + 427715.

It is an arithmetic number, because the mean of its divisors is an integer number (95701500).

Almost surely, 2^2021213304 is an apocalyptic number.

2021213304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2021213304 is an abundant number, since it is smaller than the sum of its proper divisors (4103682696).

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

2021213304 is a wasteful number, since it uses less digits than its factorization.

2021213304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850705 (or 850695 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2021213304 is about 44957.9059120863. The cubic root of 2021213304 is about 1264.3599075924.

Adding to 2021213304 its reverse (4033121202), we get a palindrome (6054334506).

The spelling of 2021213304 in words is "two billion, twenty-one million, two hundred thirteen thousand, three hundred four".