221020100002 has 8 divisors (see below), whose sum is σ = 357032469276. Its totient is φ = 102009276912.

The previous prime is 221020099999. The next prime is 221020100009. The reversal of 221020100002 is 200001020122.

It can be written as a sum of positive squares in 2 ways, for example, as 221013754641 + 6345361 = 470121^2 + 2519^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221020100009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4250386513 + ... + 4250386564.

Almost surely, 2^221020100002 is an apocalyptic number.

221020100002 is a deficient number, since it is larger than the sum of its proper divisors (136012369274).

221020100002 is a wasteful number, since it uses less digits than its factorization.

221020100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8500773092.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 221020100002 its reverse (200001020122), we get a palindrome (421021120124).

The spelling of 221020100002 in words is "two hundred twenty-one billion, twenty million, one hundred thousand, two".