20101211211212 has 12 divisors (see below), whose sum is σ = 35186249446656. Its totient is φ = 10047997083600.

The previous prime is 20101211211203. The next prime is 20101211211229. The reversal of 20101211211212 is 21211211210102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 652113164 + ... + 652143987.

It is an arithmetic number, because the mean of its divisors is an integer number (2932187453888).

Almost surely, 2^{20101211211212} is an apocalyptic number.

It is an amenable number.

20101211211212 is a deficient number, since it is larger than the sum of its proper divisors (15085038235444).

20101211211212 is a wasteful number, since it uses less digits than its factorization.

20101211211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304261008 (or 1304261006 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20101211211212 its reverse (21211211210102), we get a palindrome (41312422421314).

The spelling of 20101211211212 in words is "twenty trillion, one hundred one billion, two hundred eleven million, two hundred eleven thousand, two hundred twelve".