20110001201001 has 48 divisors (see below), whose sum is σ = 29870131883904. Its totient is φ = 13028036620032.

The previous prime is 20110001200909. The next prime is 20110001201039. The reversal of 20110001201001 is 10010210001102.

It is a happy number.

It is not a de Polignac number, because 20110001201001 - 2²⁹ = 20109464330089 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 (20110001201041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 919807996 + ... + 919829858.

It is an arithmetic number, because the mean of its divisors is an integer number (622294414248).

Almost surely, 2^{20110001201001} is an apocalyptic number.

It is an amenable number.

20110001201001 is a deficient number, since it is larger than the sum of its proper divisors (9760130682903).

20110001201001 is a wasteful number, since it uses less digits than its factorization.

20110001201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25230 (or 25227 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20110001201001 its reverse (10010210001102), we get a palindrome (30120211202103).

The spelling of 20110001201001 in words is "twenty trillion, one hundred ten billion, one million, two hundred one thousand, one".