20001100221201 has 64 divisors (see below), whose sum is σ = 29295358709760. Its totient is φ = 12037702429440.

The previous prime is 20001100221163. The next prime is 20001100221203. The reversal of 20001100221201 is 10212200110002.

It is not a de Polignac number, because 20001100221201 - 2¹³ = 20001100213009 is a prime.

It is a super-2 number, since 2×20001100221201² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20001100221203) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7822095015 + ... + 7822097571.

It is an arithmetic number, because the mean of its divisors is an integer number (457739979840).

Almost surely, 2^{20001100221201} is an apocalyptic number.

It is an amenable number.

20001100221201 is a deficient number, since it is larger than the sum of its proper divisors (9294258488559).

20001100221201 is a wasteful number, since it uses less digits than its factorization.

20001100221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5326.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20001100221201 its reverse (10212200110002), we get a palindrome (30213300331203).

The spelling of 20001100221201 in words is "twenty trillion, one billion, one hundred million, two hundred twenty-one thousand, two hundred one".