2012120221 has 4 divisors (see below), whose sum is σ = 2130480252. Its totient is φ = 1893760192.

The previous prime is 2012120219. The next prime is 2012120263. The reversal of 2012120221 is 1220212102.

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 1844702500 + 167417721 = 42950^2 + 12939^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012120221 - 2¹ = 2012120219 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 (2012124221) 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 3 ways as a sum of consecutive naturals, for example, 59179990 + ... + 59180023.

It is an arithmetic number, because the mean of its divisors is an integer number (532620063).

Almost surely, 2^2012120221 is an apocalyptic number.

It is an amenable number.

2012120221 is a deficient number, since it is larger than the sum of its proper divisors (118360031).

2012120221 is a wasteful number, since it uses less digits than its factorization.

2012120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118360030.

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

The square root of 2012120221 is about 44856.6630613558. The cubic root of 2012120221 is about 1262.4610128927.

Adding to 2012120221 its reverse (1220212102), we get a palindrome (3232332323).

The spelling of 2012120221 in words is "two billion, twelve million, one hundred twenty thousand, two hundred twenty-one".