100012123212 has 12 divisors (see below), whose sum is σ = 233361620856. Its totient is φ = 33337374400.

The previous prime is 100012123199. The next prime is 100012123217. The reversal of 100012123212 is 212321210001.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 100012123191 and 100012123200.

It is not an unprimeable number, because it can be changed into a prime (100012123217) 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 3 ways as a sum of consecutive naturals, for example, 4167171789 + ... + 4167171812.

It is an arithmetic number, because the mean of its divisors is an integer number (19446801738).

Almost surely, 2^100012123212 is an apocalyptic number.

100012123212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100012123212 is an abundant number, since it is smaller than the sum of its proper divisors (133349497644).

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

100012123212 is a wasteful number, since it uses less digits than its factorization.

100012123212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8334343608 (or 8334343606 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 100012123212 its reverse (212321210001), we get a palindrome (312333333213).

It can be divided in two parts, 10001 and 2123212, that multiplied together give a palindrome (21234243212).

The spelling of 100012123212 in words is "one hundred billion, twelve million, one hundred twenty-three thousand, two hundred twelve".