20121212206 has 16 divisors (see below), whose sum is σ = 32637162816. Its totient is φ = 9267341056.

The previous prime is 20121212183. The next prime is 20121212207. The reversal of 20121212206 is 60221212102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121212207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6294151 + ... + 6297346.

It is an arithmetic number, because the mean of its divisors is an integer number (2039822676).

Almost surely, 2^20121212206 is an apocalyptic number.

20121212206 is a deficient number, since it is larger than the sum of its proper divisors (12515950610).

20121212206 is a wasteful number, since it uses less digits than its factorization.

20121212206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12591563.

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

Adding to 20121212206 its reverse (60221212102), we get a palindrome (80342424308).

The spelling of 20121212206 in words is "twenty billion, one hundred twenty-one million, two hundred twelve thousand, two hundred six".