100001221212212 has 12 divisors (see below), whose sum is σ = 175003104414180. Its totient is φ = 50000334236736.

The previous prime is 100001221212161. The next prime is 100001221212353. The reversal of 100001221212212 is 212212122100001.

It can be written as a sum of positive squares in 2 ways, for example, as 24514421049616 + 75486800162596 = 4951204^2 + 8688314^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68277137 + ... + 69726392.

It is an arithmetic number, because the mean of its divisors is an integer number (14583592034515).

Almost surely, 2^{100001221212212} is an apocalyptic number.

It is an amenable number.

100001221212212 is a deficient number, since it is larger than the sum of its proper divisors (75001883201968).

100001221212212 is a wasteful number, since it uses less digits than its factorization.

100001221212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138184690 (or 138184688 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 100001221212212 its reverse (212212122100001), we get a palindrome (312213343312213).

The spelling of 100001221212212 in words is "one hundred trillion, one billion, two hundred twenty-one million, two hundred twelve thousand, two hundred twelve".