221101212202 has 16 divisors (see below), whose sum is σ = 357594368040. Its totient is φ = 101923607232.

The previous prime is 221101212191. The next prime is 221101212221. The reversal of 221101212202 is 202212101122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 85795682281 + 135305529921 = 292909^2 + 367839^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5107453 + ... + 5150560.

Almost surely, 2^221101212202 is an apocalyptic number.

221101212202 is a deficient number, since it is larger than the sum of its proper divisors (136493155838).

221101212202 is a wasteful number, since it uses less digits than its factorization.

221101212202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10258857.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221101212202 its reverse (202212101122), we get a palindrome (423313313324).

The spelling of 221101212202 in words is "two hundred twenty-one billion, one hundred one million, two hundred twelve thousand, two hundred two".