20102221221001 has 16 divisors (see below), whose sum is σ = 20608498262016. Its totient is φ = 19608374148000.

The previous prime is 20102221220947. The next prime is 20102221221101. The reversal of 20102221221001 is 10012212220102.

It is a happy number.

It is not a de Polignac number, because 20102221221001 - 2²³ = 20102212832393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20102221221101) 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, 432180336 + ... + 432226846.

It is an arithmetic number, because the mean of its divisors is an integer number (1288031141376).

Almost surely, 2^{20102221221001} is an apocalyptic number.

It is an amenable number.

20102221221001 is a deficient number, since it is larger than the sum of its proper divisors (506277041015).

20102221221001 is an frugal number, since it uses more digits than its factorization.

20102221221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52905 (or 52823 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20102221221001 its reverse (10012212220102), we get a palindrome (30114433441103).

The spelling of 20102221221001 in words is "twenty trillion, one hundred two billion, two hundred twenty-one million, two hundred twenty-one thousand, one".