100002222121212 has 36 divisors (see below), whose sum is σ = 253533493931536. Its totient is φ = 33235159870080.

The previous prime is 100002222121099. The next prime is 100002222121273. The reversal of 100002222121212 is 212121222200001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-5 number, since 5×100002222121212⁵ (a number of 71 digits) contains 55555 as substring. Note that it is a super-d number also for d = 3.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4121411464 + ... + 4121435727.

Almost surely, 2^{100002222121212} is an apocalyptic number.

100002222121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100002222121212 is an abundant number, since it is smaller than the sum of its proper divisors (153531271810324).

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

100002222121212 is a wasteful number, since it uses less digits than its factorization.

100002222121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8242847538 (or 8242847533 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 100002222121212 its reverse (212121222200001), we get a palindrome (312123444321213).

The spelling of 100002222121212 in words is "one hundred trillion, two billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twelve".