100121200212 has 96 divisors (see below), whose sum is σ = 258518905344. Its totient is φ = 29906128000.

The previous prime is 100121200199. The next prime is 100121200219. The reversal of 100121200212 is 212002121001.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121200219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3009823 + ... + 3042905.

It is an arithmetic number, because the mean of its divisors is an integer number (2692905264).

Almost surely, 2^100121200212 is an apocalyptic number.

100121200212 is a gapful number since it is divisible by the number (12) 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 100121200212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129259452672).

100121200212 is an abundant number, since it is smaller than the sum of its proper divisors (158397705132).

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

100121200212 is a wasteful number, since it uses less digits than its factorization.

100121200212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33429 (or 33427 counting only the distinct ones).

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

Adding to 100121200212 its reverse (212002121001), we get a palindrome (312123321213).

It can be divided in two parts, 1001 and 21200212, that multiplied together give a palindrome (21221412212).

The spelling of 100121200212 in words is "one hundred billion, one hundred twenty-one million, two hundred thousand, two hundred twelve".