100000212121200 has 120 divisors (see below), whose sum is σ = 327783641202688. Its totient is φ = 26046566864640.

The previous prime is 100000212121189. The next prime is 100000212121261. The reversal of 100000212121200 is 2121212000001.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 968942704 + ... + 969045903.

Almost surely, 2^{100000212121200} is an apocalyptic number.

100000212121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100000212121200 is an abundant number, since it is smaller than the sum of its proper divisors (227783429081488).

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

100000212121200 is a wasteful number, since it uses less digits than its factorization.

100000212121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937988671 (or 1937988660 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 100000212121200 its reverse (2121212000001), we get a palindrome (102121424121201).

The spelling of 100000212121200 in words is "one hundred trillion, two hundred twelve million, one hundred twenty-one thousand, two hundred".