212021000221212 has 864 divisors, whose sum is σ = 722646814780800. Its totient is φ = 52040075028480.

The previous prime is 212021000221187. The next prime is 212021000221301. The reversal of 212021000221212 is 212122000120212.

It is a happy number.

212021000221212 is a `hidden beast` number, since 2 + 1 + 20 + 210 + 0 + 0 + 221 + 212 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 3141902512 + ... + 3141969992.

Almost surely, 2^{212021000221212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212021000221212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361323407390400).

212021000221212 is an abundant number, since it is smaller than the sum of its proper divisors (510625814559588).

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

212021000221212 is a wasteful number, since it uses less digits than its factorization.

212021000221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67608 (or 67566 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212021000221212 its reverse (212122000120212), we get a palindrome (424143000341424).

It can be divided in two parts, 212021000 and 221212, that added together give a palindrome (212242212).

The spelling of 212021000221212 in words is "two hundred twelve trillion, twenty-one billion, two hundred twenty-one thousand, two hundred twelve".