221100100202 has 8 divisors (see below), whose sum is σ = 332883051300. Its totient is φ = 110139083104.

The previous prime is 221100100187. The next prime is 221100100213. The reversal of 221100100202 is 202001001122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 219765001681 + 1335098521 = 468791^2 + 36539^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205482827 + ... + 205483902.

Almost surely, 2^221100100202 is an apocalyptic number.

221100100202 is a deficient number, since it is larger than the sum of its proper divisors (111782951098).

221100100202 is a wasteful number, since it uses less digits than its factorization.

221100100202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410967000.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221100100202 its reverse (202001001122), we get a palindrome (423101101324).

The spelling of 221100100202 in words is "two hundred twenty-one billion, one hundred million, one hundred thousand, two hundred two".