20001144231201 has 16 divisors (see below), whose sum is σ = 32270753718144. Its totient is φ = 10756917905664.

The previous prime is 20001144231199. The next prime is 20001144231221. The reversal of 20001144231201 is 10213244110002.

It is not a de Polignac number, because 20001144231201 - 2¹ = 20001144231199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20001144231221) 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 15 ways as a sum of consecutive naturals, for example, 28012806690 + ... + 28012807403.

It is an arithmetic number, because the mean of its divisors is an integer number (2016922107384).

Almost surely, 2^{20001144231201} is an apocalyptic number.

20001144231201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20001144231201 is a deficient number, since it is larger than the sum of its proper divisors (12269609486943).

20001144231201 is a wasteful number, since it uses less digits than its factorization.

20001144231201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56025614120.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20001144231201 its reverse (10213244110002), we get a palindrome (30214388341203).

The spelling of 20001144231201 in words is "twenty trillion, one billion, one hundred forty-four million, two hundred thirty-one thousand, two hundred one".