2121221202 has 16 divisors (see below), whose sum is σ = 4332707712. Its totient is φ = 692029520.

The previous prime is 2121221171. The next prime is 2121221209. The reversal of 2121221202 is 2021221212.

It is not an unprimeable number, because it can be changed into a prime (2121221209) 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, 3760749 + ... + 3761312.

It is an arithmetic number, because the mean of its divisors is an integer number (270794232).

Almost surely, 2^2121221202 is an apocalyptic number.

2121221202 is an abundant number, since it is smaller than the sum of its proper divisors (2211486510).

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

2121221202 is a wasteful number, since it uses less digits than its factorization.

2121221202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7522113.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2121221202 is about 46056.7172299546. The cubic root of 2121221202 is about 1284.8782762057.

Adding to 2121221202 its reverse (2021221212), we get a palindrome (4142442414).

The spelling of 2121221202 in words is "two billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred two".