100121002002100 has 72 divisors (see below), whose sum is σ = 224757292112640. Its totient is φ = 38666921704320.

The previous prime is 100121002002029. The next prime is 100121002002101. The reversal of 100121002002100 is 1200200121001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121002002101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 288686997 + ... + 289033603.

It is an arithmetic number, because the mean of its divisors is an integer number (3121629057120).

Almost surely, 2^{100121002002100} is an apocalyptic number.

100121002002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121002002100 is an abundant number, since it is smaller than the sum of its proper divisors (124636290110540).

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

100121002002100 is a wasteful number, since it uses less digits than its factorization.

100121002002100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446257 (or 446250 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 100121002002100 its reverse (1200200121001), we get a palindrome (101321202123101).

The spelling of 100121002002100 in words is "one hundred trillion, one hundred twenty-one billion, two million, two thousand, one hundred".