10001121002100 has 54 divisors (see below), whose sum is σ = 31347958166070. Its totient is φ = 2666965600320.

The previous prime is 10001121002069. The next prime is 10001121002141. The reversal of 10001121002100 is 120012110001.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1940370992784 + 8060750009316 = 1392972^2 + 2839146^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 5556177435 + ... + 5556179234.

Almost surely, 2^{10001121002100} is an apocalyptic number.

10001121002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10001121002100 is an abundant number, since it is smaller than the sum of its proper divisors (21346837163970).

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

10001121002100 is a wasteful number, since it uses less digits than its factorization.

10001121002100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11112356689 (or 11112356679 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10001121002100 its reverse (120012110001), we get a palindrome (10121133112101).

The spelling of 10001121002100 in words is "ten trillion, one billion, one hundred twenty-one million, two thousand, one hundred".