100212121021200 has 240 divisors, whose sum is σ = 332547360701952. Its totient is φ = 25769157120000.

The previous prime is 100212121021153. The next prime is 100212121021211. The reversal of 100212121021200 is 2120121212001.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 100212121021200.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5659830 + ... + 15246570.

Almost surely, 2^{100212121021200} is an apocalyptic number.

100212121021200 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 100212121021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166273680350976).

100212121021200 is an abundant number, since it is smaller than the sum of its proper divisors (232335239680752).

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

100212121021200 is a wasteful number, since it uses less digits than its factorization.

100212121021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9587074 (or 9587063 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 100212121021200 its reverse (2120121212001), we get a palindrome (102332242233201).

The spelling of 100212121021200 in words is "one hundred trillion, two hundred twelve billion, one hundred twenty-one million, twenty-one thousand, two hundred".