2121774220 has 12 divisors (see below), whose sum is σ = 4455725904. Its totient is φ = 848709680.

The previous prime is 2121774169. The next prime is 2121774223. The reversal of 2121774220 is 224771212.

It is not an unprimeable number, because it can be changed into a prime (2121774223) 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, 53044336 + ... + 53044375.

It is an arithmetic number, because the mean of its divisors is an integer number (371310492).

Almost surely, 2^2121774220 is an apocalyptic number.

2121774220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121774220 is an abundant number, since it is smaller than the sum of its proper divisors (2333951684).

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

2121774220 is a wasteful number, since it uses less digits than its factorization.

2121774220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106088720 (or 106088718 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 2121774220 is about 46062.7205015075. The cubic root of 2121774220 is about 1284.9899255823.

The spelling of 2121774220 in words is "two billion, one hundred twenty-one million, seven hundred seventy-four thousand, two hundred twenty".