10001220102221 has 4 divisors (see below), whose sum is σ = 10001267584572. Its totient is φ = 10001172619872.

The previous prime is 10001220102199. The next prime is 10001220102323. The reversal of 10001220102221 is 12220102210001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8091464702500 + 1909755399721 = 2844550^2 + 1381939^2 .

It is a cyclic number.

It is not a de Polignac number, because 10001220102221 - 2⁶ = 10001220102157 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 = 10001220102196 and 10001220102205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001220192221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23423816 + ... + 23846961.

It is an arithmetic number, because the mean of its divisors is an integer number (2500316896143).

Almost surely, 2^{10001220102221} is an apocalyptic number.

It is an amenable number.

10001220102221 is a deficient number, since it is larger than the sum of its proper divisors (47482351).

10001220102221 is an equidigital number, since it uses as much as digits as its factorization.

10001220102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47482350.

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

Adding to 10001220102221 its reverse (12220102210001), we get a palindrome (22221322312222).

The spelling of 10001220102221 in words is "ten trillion, one billion, two hundred twenty million, one hundred two thousand, two hundred twenty-one".