100121020000 has 120 divisors (see below), whose sum is σ = 246575520576. Its totient is φ = 40005696000.

The previous prime is 100121019991. The next prime is 100121020003. The reversal of 100121020000 is 20121001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121020003) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 24257937 + ... + 24262063.

Almost surely, 2^100121020000 is an apocalyptic number.

100121020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100121020000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123287760288).

100121020000 is an abundant number, since it is smaller than the sum of its proper divisors (146454500576).

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

100121020000 is an equidigital number, since it uses as much as digits as its factorization.

100121020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5370 (or 5347 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 100121020000 its reverse (20121001), we get a palindrome (100141141001).

The spelling of 100121020000 in words is "one hundred billion, one hundred twenty-one million, twenty thousand".