2121203310 has 32 divisors (see below), whose sum is σ = 5138474112. Its totient is φ = 560366880.

The previous prime is 2121203309. The next prime is 2121203311. The reversal of 2121203310 is 133021212.

It is an interprime number because it is at equal distance from previous prime (2121203309) and next prime (2121203311).

It is a super-2 number, since 2×2121203310² = 8999006964709912200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2121203310.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121203311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327196 + ... + 333615.

It is an arithmetic number, because the mean of its divisors is an integer number (160577316).

Almost surely, 2^2121203310 is an apocalyptic number.

2121203310 is an abundant number, since it is smaller than the sum of its proper divisors (3017270802).

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

2121203310 is a wasteful number, since it uses less digits than its factorization.

2121203310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660928.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2121203310 is about 46056.5229907773. The cubic root of 2121203310 is about 1284.8746636473.

Adding to 2121203310 its reverse (133021212), we get a palindrome (2254224522).

The spelling of 2121203310 in words is "two billion, one hundred twenty-one million, two hundred three thousand, three hundred ten".