2010122221 has 4 divisors (see below), whose sum is σ = 2010855132. Its totient is φ = 2009389312.

The previous prime is 2010122201. The next prime is 2010122239. The reversal of 2010122221 is 1222210102.

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 1954082025 + 56040196 = 44205^2 + 7486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2010122221 - 2¹⁵ = 2010089453 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 (2010122201) 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, 362326 + ... + 367831.

It is an arithmetic number, because the mean of its divisors is an integer number (502713783).

Almost surely, 2^2010122221 is an apocalyptic number.

It is an amenable number.

2010122221 is a deficient number, since it is larger than the sum of its proper divisors (732911).

2010122221 is an equidigital number, since it uses as much as digits as its factorization.

2010122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732910.

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

The square root of 2010122221 is about 44834.3865910977. The cubic root of 2010122221 is about 1262.0430073089.

Adding to 2010122221 its reverse (1222210102), we get a palindrome (3232332323).

The spelling of 2010122221 in words is "two billion, ten million, one hundred twenty-two thousand, two hundred twenty-one".