10001111221212 has 48 divisors (see below), whose sum is σ = 23997080876160. Its totient is φ = 3239482047552.

The previous prime is 10001111221187. The next prime is 10001111221223. The reversal of 10001111221212 is 21212211110001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 10001111221191 and 10001111221200.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13961262 + ... + 14660117.

It is an arithmetic number, because the mean of its divisors is an integer number (499939184920).

Almost surely, 2^{10001111221212} is an apocalyptic number.

10001111221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10001111221212 is an abundant number, since it is smaller than the sum of its proper divisors (13995969654948).

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

10001111221212 is a wasteful number, since it uses less digits than its factorization.

10001111221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28622210 (or 28622208 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 10001111221212 its reverse (21212211110001), we get a palindrome (31213322331213).

The spelling of 10001111221212 in words is "ten trillion, one billion, one hundred eleven million, two hundred twenty-one thousand, two hundred twelve".