20102001012221 has 8 divisors (see below), whose sum is σ = 20133174507000. Its totient is φ = 20070828709632.

The previous prime is 20102001012211. The next prime is 20102001012227. The reversal of 20102001012221 is 12221010020102.

It can be written as a sum of positive squares in 4 ways, for example, as 882641460100 + 19219359552121 = 939490^2 + 4383989^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20102001012221 - 2¹⁸ = 20102000750077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20102001012196 and 20102001012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102001012227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37077905 + ... + 37616153.

It is an arithmetic number, because the mean of its divisors is an integer number (2516646813375).

Almost surely, 2^{20102001012221} is an apocalyptic number.

It is an amenable number.

20102001012221 is a deficient number, since it is larger than the sum of its proper divisors (31173494779).

20102001012221 is an equidigital number, since it uses as much as digits as its factorization.

20102001012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596095.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20102001012221 its reverse (12221010020102), we get a palindrome (32323011032323).

The spelling of 20102001012221 in words is "twenty trillion, one hundred two billion, one million, twelve thousand, two hundred twenty-one".