2021122212212 has 18 divisors (see below), whose sum is σ = 3572330114934. Its totient is φ = 1000555530400.

The previous prime is 2021122212211. The next prime is 2021122212247. The reversal of 2021122212212 is 2122122211202.

It can be written as a sum of positive squares in 3 ways, for example, as 1624391034256 + 396731177956 = 1274516^2 + 629866^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021122212211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24725423 + ... + 24807030.

It is an arithmetic number, because the mean of its divisors is an integer number (198462784163).

Almost surely, 2^{2021122212212} is an apocalyptic number.

It is an amenable number.

2021122212212 is a deficient number, since it is larger than the sum of its proper divisors (1551207902722).

2021122212212 is a wasteful number, since it uses less digits than its factorization.

2021122212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49532659 (or 49532556 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2021122212212 its reverse (2122122211202), we get a palindrome (4143244423414).

The spelling of 2021122212212 in words is "two trillion, twenty-one billion, one hundred twenty-two million, two hundred twelve thousand, two hundred twelve".