20121002000001 has 24 divisors (see below), whose sum is σ = 33289599283200. Its totient is φ = 11472108028416.

The previous prime is 20121001999991. The next prime is 20121002000027. The reversal of 20121002000001 is 10000020012102.

It is not a de Polignac number, because 20121002000001 - 2⁷ = 20121001999873 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (20121002000401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 355629825 + ... + 355686398.

It is an arithmetic number, because the mean of its divisors is an integer number (1387066636800).

Almost surely, 2^{20121002000001} is an apocalyptic number.

20121002000001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20121002000001 is a deficient number, since it is larger than the sum of its proper divisors (13168597283199).

20121002000001 is a wasteful number, since it uses less digits than its factorization.

20121002000001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711316685 (or 711316682 counting only the distinct ones).

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

Adding to 20121002000001 its reverse (10000020012102), we get a palindrome (30121022012103).

The spelling of 20121002000001 in words is "twenty trillion, one hundred twenty-one billion, two million, one", and thus it is an aban number.