212021182021 has 16 divisors (see below), whose sum is σ = 231974561088. Its totient is φ = 192181334400.

The previous prime is 212021182019. The next prime is 212021182057. The reversal of 212021182021 is 120281120212.

It is not a de Polignac number, because 212021182021 - 2¹ = 212021182019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212021181983 and 212021182001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021182081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12232041 + ... + 12249361.

It is an arithmetic number, because the mean of its divisors is an integer number (14498410068).

Almost surely, 2^212021182021 is an apocalyptic number.

It is an amenable number.

212021182021 is a deficient number, since it is larger than the sum of its proper divisors (19953379067).

212021182021 is a wasteful number, since it uses less digits than its factorization.

212021182021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20532.

The product of its (nonzero) digits is 256, while the sum is 22.

The spelling of 212021182021 in words is "two hundred twelve billion, twenty-one million, one hundred eighty-two thousand, twenty-one".