20121020210120 has 128 divisors (see below), whose sum is σ = 45812692800000. Its totient is φ = 7952918679552.

The previous prime is 20121020210041. The next prime is 20121020210143. The reversal of 20121020210120 is 2101202012102.

It is a junction number, because it is equal to n+sod(n) for n = 20121020210095 and 20121020210104.

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 31 ways as a sum of consecutive naturals, for example, 4328029556 + ... + 4328034204.

It is an arithmetic number, because the mean of its divisors is an integer number (357911662500).

Almost surely, 2^{20121020210120} is an apocalyptic number.

20121020210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121020210120 is an abundant number, since it is smaller than the sum of its proper divisors (25691672589880).

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

20121020210120 is a wasteful number, since it uses less digits than its factorization.

20121020210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8295 (or 8291 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20121020210120 its reverse (2101202012102), we get a palindrome (22222222222222).

The spelling of 20121020210120 in words is "twenty trillion, one hundred twenty-one billion, twenty million, two hundred ten thousand, one hundred twenty".