20120012000001 has 12 divisors (see below), whose sum is σ = 29062542692820. Its totient is φ = 13413201423840.

The previous prime is 20120011999957. The next prime is 20120012000029. The reversal of 20120012000001 is 10000021002102.

It can be written as a sum of positive squares in 2 ways, for example, as 19841465549376 + 278546450625 = 4454376^2 + 527775^2 .

It is not a de Polignac number, because 20120012000001 - 2¹³ = 20120011991809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20120012002001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10744570 + ... + 12477411.

It is an arithmetic number, because the mean of its divisors is an integer number (2421878557735).

Almost surely, 2^{20120012000001} is an apocalyptic number.

It is an amenable number.

20120012000001 is a deficient number, since it is larger than the sum of its proper divisors (8942530692819).

20120012000001 is a wasteful number, since it uses less digits than its factorization.

20120012000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23318256 (or 23318253 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20120012000001 its reverse (10000021002102), we get a palindrome (30120033002103).

The spelling of 20120012000001 in words is "twenty trillion, one hundred twenty billion, twelve million, one", and thus it is an aban number.