100221212212 has 24 divisors (see below), whose sum is σ = 194467990752. Its totient is φ = 44808290400.

The previous prime is 100221212209. The next prime is 100221212213. The reversal of 100221212212 is 212212122001.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221212213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18667438 + ... + 18672805.

It is an arithmetic number, because the mean of its divisors is an integer number (8102832948).

Almost surely, 2^100221212212 is an apocalyptic number.

It is an amenable number.

100221212212 is a deficient number, since it is larger than the sum of its proper divisors (94246778540).

100221212212 is a wasteful number, since it uses less digits than its factorization.

100221212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37340319 (or 37340317 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 100221212212 its reverse (212212122001), we get a palindrome (312433334213).

The spelling of 100221212212 in words is "one hundred billion, two hundred twenty-one million, two hundred twelve thousand, two hundred twelve".