211212221012 has 48 divisors (see below), whose sum is σ = 428759288832. Its totient is φ = 90236298240.

The previous prime is 211212220979. The next prime is 211212221023. The reversal of 211212221012 is 210122212112.

211212221012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211212221012² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2811293 + ... + 2885444.

It is an arithmetic number, because the mean of its divisors is an integer number (8932485184).

Almost surely, 2^211212221012 is an apocalyptic number.

It is an amenable number.

211212221012 is an abundant number, since it is smaller than the sum of its proper divisors (217547067820).

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

211212221012 is a wasteful number, since it uses less digits than its factorization.

211212221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5696808 (or 5696806 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211212221012 its reverse (210122212112), we get a palindrome (421334433124).

The spelling of 211212221012 in words is "two hundred eleven billion, two hundred twelve million, two hundred twenty-one thousand, twelve".