221220200108 has 12 divisors (see below), whose sum is σ = 387139003440. Its totient is φ = 110609056272.

The previous prime is 221220200107. The next prime is 221220200137. The reversal of 221220200108 is 801002022122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221220200108.

It is not an unprimeable number, because it can be changed into a prime (221220200107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404438 + ... + 778466.

It is an arithmetic number, because the mean of its divisors is an integer number (32261583620).

Almost surely, 2^221220200108 is an apocalyptic number.

It is an amenable number.

221220200108 is a deficient number, since it is larger than the sum of its proper divisors (165918803332).

221220200108 is a wasteful number, since it uses less digits than its factorization.

221220200108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521896 (or 521894 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The spelling of 221220200108 in words is "two hundred twenty-one billion, two hundred twenty million, two hundred thousand, one hundred eight".