1001220222100 has 36 divisors (see below), whose sum is σ = 2483026152544. Its totient is φ = 343275504480.

The previous prime is 1001220222091. The next prime is 1001220222103. The reversal of 1001220222100 is 12220221001.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001220222103) 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 11 ways as a sum of consecutive naturals, for example, 715156602 + ... + 715158001.

Almost surely, 2^{1001220222100} is an apocalyptic number.

1001220222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001220222100 is an abundant number, since it is smaller than the sum of its proper divisors (1481805930444).

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

1001220222100 is a wasteful number, since it uses less digits than its factorization.

1001220222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430314624 (or 1430314617 counting only the distinct ones).

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

Adding to 1001220222100 its reverse (12220221001), we get a palindrome (1013440443101).

The spelling of 1001220222100 in words is "one trillion, one billion, two hundred twenty million, two hundred twenty-two thousand, one hundred".