2021522212 has 6 divisors (see below), whose sum is σ = 3537663878. Its totient is φ = 1010761104.

The previous prime is 2021522159. The next prime is 2021522267. The reversal of 2021522212 is 2122251202.

It can be written as a sum of positive squares in only one way, i.e., 1711973376 + 309548836 = 41376^2 + 17594^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2021522212.

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 as a sum of consecutive naturals, namely, 252690273 + ... + 252690280.

Almost surely, 2^2021522212 is an apocalyptic number.

It is an amenable number.

2021522212 is a deficient number, since it is larger than the sum of its proper divisors (1516141666).

2021522212 is a wasteful number, since it uses less digits than its factorization.

2021522212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505380557 (or 505380555 counting only the distinct ones).

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

The square root of 2021522212 is about 44961.3413056150. The cubic root of 2021522212 is about 1264.4243162645.

Adding to 2021522212 its reverse (2122251202), we get a palindrome (4143773414).

The spelling of 2021522212 in words is "two billion, twenty-one million, five hundred twenty-two thousand, two hundred twelve".