1002001212221 has 8 divisors (see below), whose sum is σ = 1006782662688. Its totient is φ = 997220070000.

The previous prime is 1002001212203. The next prime is 1002001212259. The reversal of 1002001212221 is 1222121002001.

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 1002001212221 - 2³⁸ = 727123305277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002001212196 and 1002001212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002001217221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8954306 + ... + 9065516.

It is an arithmetic number, because the mean of its divisors is an integer number (125847832836).

Almost surely, 2^{1002001212221} is an apocalyptic number.

It is an amenable number.

1002001212221 is a deficient number, since it is larger than the sum of its proper divisors (4781450467).

1002001212221 is a wasteful number, since it uses less digits than its factorization.

1002001212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154123.

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

Adding to 1002001212221 its reverse (1222121002001), we get a palindrome (2224122214222).

The spelling of 1002001212221 in words is "one trillion, two billion, one million, two hundred twelve thousand, two hundred twenty-one".