20112122121212 has 48 divisors (see below), whose sum is σ = 39477492923904. Its totient is φ = 8885989872000.

The previous prime is 20112122121209. The next prime is 20112122121307. The reversal of 20112122121212 is 21212122121102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20080538 + ... + 21058305.

It is an arithmetic number, because the mean of its divisors is an integer number (822447769248).

Almost surely, 2^{20112122121212} is an apocalyptic number.

20112122121212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20112122121212 is a deficient number, since it is larger than the sum of its proper divisors (19365370802692).

20112122121212 is a wasteful number, since it uses less digits than its factorization.

20112122121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41139170 (or 41139168 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 20112122121212 its reverse (21212122121102), we get a palindrome (41324244242314).

The spelling of 20112122121212 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twelve".