20121212102212 has 12 divisors (see below), whose sum is σ = 37920745885036. Its totient is φ = 9286713277920.

The previous prime is 20121212102207. The next prime is 20121212102219. The reversal of 20121212102212 is 21220121212102.

It can be written as a sum of positive squares in 2 ways, for example, as 2499636888576 + 17621575213636 = 1581024^2 + 4197806^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20121212102212.

It is not an unprimeable number, because it can be changed into a prime (20121212102219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193473193239 + ... + 193473193342.

Almost surely, 2^{20121212102212} is an apocalyptic number.

It is an amenable number.

20121212102212 is a deficient number, since it is larger than the sum of its proper divisors (17799533782824).

20121212102212 is a wasteful number, since it uses less digits than its factorization.

20121212102212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386946386598 (or 386946386596 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20121212102212 its reverse (21220121212102), we get a palindrome (41341333314314).

It can be divided in two parts, 20121212102 and 212, that multiplied together give a palindrome (4265696965624).

The spelling of 20121212102212 in words is "twenty trillion, one hundred twenty-one billion, two hundred twelve million, one hundred two thousand, two hundred twelve".