1001001200221 has 8 divisors (see below), whose sum is σ = 1098540241344. Its totient is φ = 904551981120.

The previous prime is 1001001200209. The next prime is 1001001200249. The reversal of 1001001200221 is 1220021001001.

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 1001001200221 - 2⁵ = 1001001200189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001001200198 and 1001001200207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001001200921) 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 7 ways as a sum of consecutive naturals, for example, 272453580 + ... + 272457253.

It is an arithmetic number, because the mean of its divisors is an integer number (137317530168).

Almost surely, 2^{1001001200221} is an apocalyptic number.

1001001200221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1001001200221 is a deficient number, since it is larger than the sum of its proper divisors (97539041123).

1001001200221 is a wasteful number, since it uses less digits than its factorization.

1001001200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544911011.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1001001200221 its reverse (1220021001001), we get a palindrome (2221022201222).

The spelling of 1001001200221 in words is "one trillion, one billion, one million, two hundred thousand, two hundred twenty-one".