20001012200001 has 36 divisors (see below), whose sum is σ = 35068323094272. Its totient is φ = 10932230265264.

The previous prime is 20001012199999. The next prime is 20001012200003. The reversal of 20001012200001 is 10000221010002.

It is an interprime number because it is at equal distance from previous prime (20001012199999) and next prime (20001012200003).

It is not a de Polignac number, because 20001012200001 - 2¹ = 20001012199999 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 (20001012200003) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 985941361 + ... + 985961646.

It is an arithmetic number, because the mean of its divisors is an integer number (974120085952).

Almost surely, 2^{20001012200001} is an apocalyptic number.

20001012200001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20001012200001 is a deficient number, since it is larger than the sum of its proper divisors (15067310894271).

20001012200001 is a wasteful number, since it uses less digits than its factorization.

20001012200001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971903050 (or 1971903040 counting only the distinct ones).

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

Adding to 20001012200001 its reverse (10000221010002), we get a palindrome (30001233210003).

The spelling of 20001012200001 in words is "twenty trillion, one billion, twelve million, two hundred thousand, one".