20100112221212 has 12 divisors (see below), whose sum is σ = 35175979016136. Its totient is φ = 10049832502320.

The previous prime is 20100112221197. The next prime is 20100112221221. The reversal of 20100112221212 is 21212221100102.

It is a super-2 number, since 2×20100112221212² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 55699739 + ... + 56059442.

It is an arithmetic number, because the mean of its divisors is an integer number (2931331584678).

Almost surely, 2^{20100112221212} is an apocalyptic number.

It is an amenable number.

20100112221212 is a deficient number, since it is larger than the sum of its proper divisors (15075866794924).

20100112221212 is a wasteful number, since it uses less digits than its factorization.

20100112221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111804148 (or 111804146 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20100112221212 its reverse (21212221100102), we get a palindrome (41312333321314).

The spelling of 20100112221212 in words is "twenty trillion, one hundred billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twelve".