212021321212 has 12 divisors (see below), whose sum is σ = 371140203280. Its totient is φ = 105981263136.

The previous prime is 212021321137. The next prime is 212021321221. The reversal of 212021321212 is 212123120212.

It is a super-2 number, since 2×212021321212² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212021321212.

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 3 ways as a sum of consecutive naturals, for example, 7333137 + ... + 7361992.

Almost surely, 2^212021321212 is an apocalyptic number.

It is an amenable number.

212021321212 is a deficient number, since it is larger than the sum of its proper divisors (159118882068).

212021321212 is a wasteful number, since it uses less digits than its factorization.

212021321212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14698740 (or 14698738 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212021321212 its reverse (212123120212), we get a palindrome (424144441424).

The spelling of 212021321212 in words is "two hundred twelve billion, twenty-one million, three hundred twenty-one thousand, two hundred twelve".