20101220210212 has 6 divisors (see below), whose sum is σ = 35177135367878. Its totient is φ = 10050610105104.

The previous prime is 20101220210119. The next prime is 20101220210213. The reversal of 20101220210212 is 21201202210102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16592701615396 + 3508518594816 = 4073414^2 + 1873104^2 .

It is a super-4 number, since 4×20101220210212⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (20101220210213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2512652526273 + ... + 2512652526280.

Almost surely, 2^{20101220210212} is an apocalyptic number.

It is an amenable number.

20101220210212 is a deficient number, since it is larger than the sum of its proper divisors (15075915157666).

20101220210212 is a wasteful number, since it uses less digits than its factorization.

20101220210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5025305052557 (or 5025305052555 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20101220210212 its reverse (21201202210102), we get a palindrome (41302422420314).

The spelling of 20101220210212 in words is "twenty trillion, one hundred one billion, two hundred twenty million, two hundred ten thousand, two hundred twelve".