1002221022100 has 18 divisors (see below), whose sum is σ = 2174819618174. Its totient is φ = 400888408800.

The previous prime is 1002221022083. The next prime is 1002221022113. The reversal of 1002221022100 is 12201222001.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 167618185744 + 834602836356 = 409412^2 + 913566^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5011105011 + ... + 5011105210.

Almost surely, 2^{1002221022100} is an apocalyptic number.

1002221022100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002221022100 is an abundant number, since it is smaller than the sum of its proper divisors (1172598596074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1002221022100 is a wasteful number, since it uses less digits than its factorization.

1002221022100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10022210235 (or 10022210228 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1002221022100 its reverse (12201222001), we get a palindrome (1014422244101).

The spelling of 1002221022100 in words is "one trillion, two billion, two hundred twenty-one million, twenty-two thousand, one hundred".