221002010001 has 24 divisors (see below), whose sum is σ = 321647622816. Its totient is φ = 146220560640.

The previous prime is 221002009993. The next prime is 221002010011. The reversal of 221002010001 is 100010200122.

It is not a de Polignac number, because 221002010001 - 2³ = 221002009993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (221002010011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 505506 + ... + 835188.

It is an arithmetic number, because the mean of its divisors is an integer number (13401984284).

Almost surely, 2^221002010001 is an apocalyptic number.

It is an amenable number.

221002010001 is a deficient number, since it is larger than the sum of its proper divisors (100645612815).

221002010001 is a wasteful number, since it uses less digits than its factorization.

221002010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330253 (or 330250 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 221002010001 its reverse (100010200122), we get a palindrome (321012210123).

The spelling of 221002010001 in words is "two hundred twenty-one billion, two million, ten thousand, one".