221002100101001 has 8 divisors (see below), whose sum is σ = 234128916806400. Its totient is φ = 207889360414528.

The previous prime is 221002100100989. The next prime is 221002100101007. The reversal of 221002100101001 is 100101001200122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221002100101001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221002100101007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3519222401 + ... + 3519285198.

It is an arithmetic number, because the mean of its divisors is an integer number (29266114600800).

Almost surely, 2^{221002100101001} is an apocalyptic number.

It is an amenable number.

221002100101001 is a deficient number, since it is larger than the sum of its proper divisors (13126816705399).

221002100101001 is a wasteful number, since it uses less digits than its factorization.

221002100101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7038509463.

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

Adding to 221002100101001 its reverse (100101001200122), we get a palindrome (321103101301123).

The spelling of 221002100101001 in words is "two hundred twenty-one trillion, two billion, one hundred million, one hundred one thousand, one".