2121220210 has 16 divisors (see below), whose sum is σ = 3864200256. Its totient is φ = 838265008.

The previous prime is 2121220207. The next prime is 2121220217. The reversal of 2121220210 is 120221212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2121220217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1277014 + ... + 1278673.

It is an arithmetic number, because the mean of its divisors is an integer number (241512516).

Almost surely, 2^2121220210 is an apocalyptic number.

2121220210 is a deficient number, since it is larger than the sum of its proper divisors (1742980046).

2121220210 is a wasteful number, since it uses less digits than its factorization.

2121220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555777.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2121220210 is about 46056.7064606231. The cubic root of 2121220210 is about 1284.8780759124.

Adding to 2121220210 its reverse (120221212), we get a palindrome (2241441422).

The spelling of 2121220210 in words is "two billion, one hundred twenty-one million, two hundred twenty thousand, two hundred ten".