20100111201212 has 96 divisors (see below), whose sum is σ = 41612751613440. Its totient is φ = 8317278731520.

The previous prime is 20100111201187. The next prime is 20100111201227. The reversal of 20100111201212 is 21210211100102.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68681258 + ... + 68973294.

It is an arithmetic number, because the mean of its divisors is an integer number (433466162640).

Almost surely, 2^{20100111201212} is an apocalyptic number.

It is an amenable number.

20100111201212 is an abundant number, since it is smaller than the sum of its proper divisors (21512640412228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20100111201212 is a wasteful number, since it uses less digits than its factorization.

20100111201212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292851 (or 292849 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20100111201212 its reverse (21210211100102), we get a palindrome (41310322301314).

The spelling of 20100111201212 in words is "twenty trillion, one hundred billion, one hundred eleven million, two hundred one thousand, two hundred twelve".