1010001220221 has 16 divisors (see below), whose sum is σ = 1620052083200. Its totient is φ = 546767577648.

The previous prime is 1010001220201. The next prime is 1010001220237. The reversal of 1010001220221 is 1220221000101.

It is not a de Polignac number, because 1010001220221 - 2⁷ = 1010001220093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1010001220197 and 1010001220206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010001220201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1265665291 + ... + 1265666088.

It is an arithmetic number, because the mean of its divisors is an integer number (101253255200).

Almost surely, 2^{1010001220221} is an apocalyptic number.

It is an amenable number.

1010001220221 is a deficient number, since it is larger than the sum of its proper divisors (610050862979).

1010001220221 is a wasteful number, since it uses less digits than its factorization.

1010001220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2531331408.

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

Adding to 1010001220221 its reverse (1220221000101), we get a palindrome (2230222220322).

The spelling of 1010001220221 in words is "one trillion, ten billion, one million, two hundred twenty thousand, two hundred twenty-one".