20121212120028 has 48 divisors (see below), whose sum is σ = 49423359498240. Its totient is φ = 6353702035200.

The previous prime is 20121212120027. The next prime is 20121212120059. The reversal of 20121212120028 is 82002121212102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121212120027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1457748 + ... + 6509028.

It is an arithmetic number, because the mean of its divisors is an integer number (1029653322880).

Almost surely, 2^{20121212120028} is an apocalyptic number.

It is an amenable number.

20121212120028 is an abundant number, since it is smaller than the sum of its proper divisors (29302147378212).

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

20121212120028 is a wasteful number, since it uses less digits than its factorization.

20121212120028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5068778 (or 5068776 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The spelling of 20121212120028 in words is "twenty trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twenty thousand, twenty-eight".