2021123212 has 24 divisors (see below), whose sum is σ = 3573158400. Its totient is φ = 1000258560.

The previous prime is 2021123207. The next prime is 2021123231. The reversal of 2021123212 is 2123211202.

It is a happy number.

It is an unprimeable number.

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, 223662 + ... + 232522.

It is an arithmetic number, because the mean of its divisors is an integer number (148881600).

Almost surely, 2^2021123212 is an apocalyptic number.

It is an amenable number.

2021123212 is a deficient number, since it is larger than the sum of its proper divisors (1552035188).

2021123212 is a wasteful number, since it uses less digits than its factorization.

2021123212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9441 (or 9439 counting only the distinct ones).

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

The square root of 2021123212 is about 44956.9039414415. The cubic root of 2021123212 is about 1264.3411217795.

Adding to 2021123212 its reverse (2123211202), we get a palindrome (4144334414).

The spelling of 2021123212 in words is "two billion, twenty-one million, one hundred twenty-three thousand, two hundred twelve".