1002101100221 has 12 divisors (see below), whose sum is σ = 1088949774528. Its totient is φ = 921747747024.

The previous prime is 1002101100193. The next prime is 1002101100241. The reversal of 1002101100221 is 1220011012001.

It is a de Polignac number, because none of the positive numbers 2^k-1002101100221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002101100241) 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, 10428485 + ... + 10524138.

It is an arithmetic number, because the mean of its divisors is an integer number (90745814544).

Almost surely, 2^{1002101100221} is an apocalyptic number.

It is an amenable number.

1002101100221 is a deficient number, since it is larger than the sum of its proper divisors (86848674307).

1002101100221 is a wasteful number, since it uses less digits than its factorization.

1002101100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20952932 (or 20952919 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1002101100221 its reverse (1220011012001), we get a palindrome (2222112112222).

The spelling of 1002101100221 in words is "one trillion, two billion, one hundred one million, one hundred thousand, two hundred twenty-one".