2021222125 has 32 divisors (see below), whose sum is σ = 2790025056. Its totient is φ = 1452211200.

The previous prime is 2021222111. The next prime is 2021222149. The reversal of 2021222125 is 5212221202.

It can be written as a sum of positive squares in 16 ways, for example, as 1722831049 + 298391076 = 41507^2 + 17274^2 .

It is not a de Polignac number, because 2021222125 - 2¹¹ = 2021220077 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 43317 + ... + 76933.

It is an arithmetic number, because the mean of its divisors is an integer number (87188283).

Almost surely, 2^2021222125 is an apocalyptic number.

2021222125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2021222125 is a deficient number, since it is larger than the sum of its proper divisors (768802931).

2021222125 is a wasteful number, since it uses less digits than its factorization.

2021222125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33682 (or 33672 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 2021222125 is about 44958.0040148581. The cubic root of 2021222125 is about 1264.3617469006.

Adding to 2021222125 its reverse (5212221202), we get a palindrome (7233443327).

The spelling of 2021222125 in words is "two billion, twenty-one million, two hundred twenty-two thousand, one hundred twenty-five".