20121210123020 has 48 divisors (see below), whose sum is σ = 45117083531520. Its totient is φ = 7519513907136.

The previous prime is 20121210123013. The next prime is 20121210123031. The reversal of 20121210123020 is 2032101212102.

20121210123020 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 20121210123020.

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, 508605350 + ... + 508644909.

It is an arithmetic number, because the mean of its divisors is an integer number (939939240240).

Almost surely, 2^{20121210123020} is an apocalyptic number.

20121210123020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121210123020 is an abundant number, since it is smaller than the sum of its proper divisors (24995873408500).

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

20121210123020 is a wasteful number, since it uses less digits than its factorization.

20121210123020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017250334 (or 1017250332 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20121210123020 its reverse (2032101212102), we get a palindrome (22153311335122).

The spelling of 20121210123020 in words is "twenty trillion, one hundred twenty-one billion, two hundred ten million, one hundred twenty-three thousand, twenty".