20120012010021 has 256 divisors, whose sum is σ = 35108146225152. Its totient is φ = 9949298688000.

The previous prime is 20120012010017. The next prime is 20120012010037. The reversal of 20120012010021 is 12001021002102.

It is not a de Polignac number, because 20120012010021 - 2² = 20120012010017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20120012009979 and 20120012010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120012010011) by changing a digit.

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 255 ways as a sum of consecutive naturals, for example, 33477557121 + ... + 33477557721.

It is an arithmetic number, because the mean of its divisors is an integer number (137141196192).

Almost surely, 2^{20120012010021} is an apocalyptic number.

20120012010021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20120012010021 is a deficient number, since it is larger than the sum of its proper divisors (14988134215131).

20120012010021 is a wasteful number, since it uses less digits than its factorization.

20120012010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20120012010021 its reverse (12001021002102), we get a palindrome (32121033012123).

It can be divided in two parts, 201200 and 12010021, that added together give a palindrome (12211221).

The spelling of 20120012010021 in words is "twenty trillion, one hundred twenty billion, twelve million, ten thousand, twenty-one".