20102121212212 has 24 divisors (see below), whose sum is σ = 38505828658472. Its totient is φ = 9125805340800.

The previous prime is 20102121212203. The next prime is 20102121212281. The reversal of 20102121212212 is 21221212120102.

It can be written as a sum of positive squares in 4 ways, for example, as 271611914896 + 19830509297316 = 521164^2 + 4453146^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20102121212212.

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 7 ways as a sum of consecutive naturals, for example, 3168679239 + ... + 3168685582.

Almost surely, 2^{20102121212212} is an apocalyptic number.

It is an amenable number.

20102121212212 is a deficient number, since it is larger than the sum of its proper divisors (18403707446260).

20102121212212 is a wasteful number, since it uses less digits than its factorization.

20102121212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6337364899 (or 6337364897 counting only the distinct ones).

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

Adding to 20102121212212 its reverse (21221212120102), we get a palindrome (41323333332314).

The spelling of 20102121212212 in words is "twenty trillion, one hundred two billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twelve".