10001220003221 has 12 divisors (see below), whose sum is σ = 10624258864800. Its totient is φ = 9412801748160.

The previous prime is 10001220003179. The next prime is 10001220003251. The reversal of 10001220003221 is 12230002210001.

It is a happy number.

It is not a de Polignac number, because 10001220003221 - 2¹⁸ = 10001219741077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001220003196 and 10001220003205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001220003251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34448456 + ... + 34737566.

It is an arithmetic number, because the mean of its divisors is an integer number (885354905400).

Almost surely, 2^{10001220003221} is an apocalyptic number.

It is an amenable number.

10001220003221 is a deficient number, since it is larger than the sum of its proper divisors (623038861579).

10001220003221 is a wasteful number, since it uses less digits than its factorization.

10001220003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408844 (or 408827 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 10001220003221 its reverse (12230002210001), we get a palindrome (22231222213222).

The spelling of 10001220003221 in words is "ten trillion, one billion, two hundred twenty million, three thousand, two hundred twenty-one".