212122222012 has 24 divisors (see below), whose sum is σ = 380726836560. Its totient is φ = 103349370240.

The previous prime is 212122221967. The next prime is 212122222021. The reversal of 212122222012 is 210222221212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 644158 + ... + 916069.

It is an arithmetic number, because the mean of its divisors is an integer number (15863618190).

Almost surely, 2^212122222012 is an apocalyptic number.

It is an amenable number.

212122222012 is a deficient number, since it is larger than the sum of its proper divisors (168604614548).

212122222012 is a wasteful number, since it uses less digits than its factorization.

212122222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561101 (or 1561099 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 212122222012 its reverse (210222221212), we get a palindrome (422344443224).

The spelling of 212122222012 in words is "two hundred twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, twelve".