212021201005 has 8 divisors (see below), whose sum is σ = 260630940024. Its totient is φ = 165479961600.

The previous prime is 212021201003. The next prime is 212021201027. The reversal of 212021201005 is 500102120212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9072753001 + 202948448004 = 95251^2 + 450498^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212021201005 - 2¹ = 212021201003 is a prime.

It is a super-2 number, since 2×212021201005² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212021201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021201003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517124676 + ... + 517125085.

It is an arithmetic number, because the mean of its divisors is an integer number (32578867503).

Almost surely, 2^212021201005 is an apocalyptic number.

It is an amenable number.

212021201005 is a deficient number, since it is larger than the sum of its proper divisors (48609739019).

212021201005 is a wasteful number, since it uses less digits than its factorization.

212021201005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034249807.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 212021201005 its reverse (500102120212), we get a palindrome (712123321217).

The spelling of 212021201005 in words is "two hundred twelve billion, twenty-one million, two hundred one thousand, five".