2021116212 has 30 divisors (see below), whose sum is σ = 5283597858. Its totient is φ = 673705296.

The previous prime is 2021116211. The next prime is 2021116217. The reversal of 2021116212 is 2126111202.

2021116212 is a `hidden beast` number, since 20 + 21 + 1 + 1 + 621 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1957531536 + 63584676 = 44244^2 + 7974^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021116211) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 3118683 + ... + 3119330.

Almost surely, 2^2021116212 is an apocalyptic number.

It is an amenable number.

2021116212 is an abundant number, since it is smaller than the sum of its proper divisors (3262481646).

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

2021116212 is a wasteful number, since it uses less digits than its factorization.

2021116212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6238029 (or 6238018 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 2021116212 is about 44956.8260890379. The cubic root of 2021116212 is about 1264.3396621294.

Adding to 2021116212 its reverse (2126111202), we get a palindrome (4147227414).

The spelling of 2021116212 in words is "two billion, twenty-one million, one hundred sixteen thousand, two hundred twelve".