2121222301 has 24 divisors (see below), whose sum is σ = 2467755360. Its totient is φ = 1803096000.

The previous prime is 2121222269. The next prime is 2121222307. The reversal of 2121222301 is 1032221212.

It is a happy number.

It is not a de Polignac number, because 2121222301 - 2⁵ = 2121222269 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 (2121222307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6691395 + ... + 6691711.

It is an arithmetic number, because the mean of its divisors is an integer number (102823140).

Almost surely, 2^2121222301 is an apocalyptic number.

It is an amenable number.

2121222301 is a deficient number, since it is larger than the sum of its proper divisors (346533059).

2121222301 is a wasteful number, since it uses less digits than its factorization.

2121222301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2121222301 is about 46056.7291608946. The cubic root of 2121222301 is about 1284.8784981032.

Adding to 2121222301 its reverse (1032221212), we get a palindrome (3153443513).

It can be divided in two parts, 2121 and 222301, that added together give a palindrome (224422).

The spelling of 2121222301 in words is "two billion, one hundred twenty-one million, two hundred twenty-two thousand, three hundred one".