100212221121212 has 6 divisors (see below), whose sum is σ = 175371386962128. Its totient is φ = 50106110560604.

The previous prime is 100212221121157. The next prime is 100212221121217. The reversal of 100212221121212 is 212121122212001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100212221121217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12526527640148 + ... + 12526527640155.

It is an arithmetic number, because the mean of its divisors is an integer number (29228564493688).

Almost surely, 2^{100212221121212} is an apocalyptic number.

It is an amenable number.

100212221121212 is a deficient number, since it is larger than the sum of its proper divisors (75159165840916).

100212221121212 is a wasteful number, since it uses less digits than its factorization.

100212221121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25053055280307 (or 25053055280305 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 100212221121212 its reverse (212121122212001), we get a palindrome (312333343333213).

The spelling of 100212221121212 in words is "one hundred trillion, two hundred twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twelve".