212221022012 has 6 divisors (see below), whose sum is σ = 371386788528. Its totient is φ = 106110511004.

The previous prime is 212221021981. The next prime is 212221022017. The reversal of 212221022012 is 210220122212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221022017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26527627748 + ... + 26527627755.

It is an arithmetic number, because the mean of its divisors is an integer number (61897798088).

Almost surely, 2^212221022012 is an apocalyptic number.

It is an amenable number.

212221022012 is a deficient number, since it is larger than the sum of its proper divisors (159165766516).

212221022012 is a wasteful number, since it uses less digits than its factorization.

212221022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53055255507 (or 53055255505 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212221022012 its reverse (210220122212), we get a palindrome (422441144224).

The spelling of 212221022012 in words is "two hundred twelve billion, two hundred twenty-one million, twenty-two thousand, twelve".