100021021121200 has 120 divisors (see below), whose sum is σ = 242502369658560. Its totient is φ = 39642739718400.

The previous prime is 100021021121183. The next prime is 100021021121213. The reversal of 100021021121200 is 2121120120001.

It is a super-2 number, since 2×100021021121200² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33083347 + ... + 35979853.

It is an arithmetic number, because the mean of its divisors is an integer number (2020853080488).

Almost surely, 2^{100021021121200} is an apocalyptic number.

100021021121200 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 100021021121200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121251184829280).

100021021121200 is an abundant number, since it is smaller than the sum of its proper divisors (142481348537360).

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

100021021121200 is a wasteful number, since it uses less digits than its factorization.

100021021121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2897315 (or 2897304 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 100021021121200 its reverse (2121120120001), we get a palindrome (102142141241201).

The spelling of 100021021121200 in words is "one hundred trillion, twenty-one billion, twenty-one million, one hundred twenty-one thousand, two hundred".