20121020120212 has 24 divisors (see below), whose sum is σ = 40672436394240. Its totient is φ = 8607923045760.

The previous prime is 20121020120171. The next prime is 20121020120269. The reversal of 20121020120212 is 21202102012102.

It is a happy number.

It is a super-2 number, since 2×20121020120212² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13449879012 + ... + 13449880507.

It is an arithmetic number, because the mean of its divisors is an integer number (1694684849760).

Almost surely, 2^{20121020120212} is an apocalyptic number.

20121020120212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20121020120212 is an abundant number, since it is smaller than the sum of its proper divisors (20551416274028).

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

20121020120212 is a wasteful number, since it uses less digits than its factorization.

20121020120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26899759551 (or 26899759549 counting only the distinct ones).

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

Adding to 20121020120212 its reverse (21202102012102), we get a palindrome (41323122132314).

The spelling of 20121020120212 in words is "twenty trillion, one hundred twenty-one billion, twenty million, one hundred twenty thousand, two hundred twelve".