221000100002 has 16 divisors (see below), whose sum is σ = 365217090624. Its totient is φ = 99459990000.

The previous prime is 221000100001. The next prime is 221000100053. The reversal of 221000100002 is 200001000122.

It is not an unprimeable number, because it can be changed into a prime (221000100001) 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, 49727774 + ... + 49732217.

It is an arithmetic number, because the mean of its divisors is an integer number (22826068164).

Almost surely, 2^221000100002 is an apocalyptic number.

221000100002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221000100002 is a deficient number, since it is larger than the sum of its proper divisors (144216990622).

221000100002 is a wasteful number, since it uses less digits than its factorization.

221000100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99460105.

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

Adding to 221000100002 its reverse (200001000122), we get a palindrome (421001100124).

The spelling of 221000100002 in words is "two hundred twenty-one billion, one hundred thousand, two".