100212121112 has 32 divisors (see below), whose sum is σ = 196469971200. Its totient is φ = 47829079584.

The previous prime is 100212121111. The next prime is 100212121117. The reversal of 100212121112 is 211121212001.

It is a super-2 number, since 2×100212121112² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100212121111) 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, 469562 + ... + 648777.

It is an arithmetic number, because the mean of its divisors is an integer number (6139686600).

Almost surely, 2^100212121112 is an apocalyptic number.

It is an amenable number.

100212121112 is a deficient number, since it is larger than the sum of its proper divisors (96257850088).

100212121112 is a wasteful number, since it uses less digits than its factorization.

100212121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118855 (or 1118851 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 100212121112 its reverse (211121212001), we get a palindrome (311333333113).

It can be divided in two parts, 100 and 212121112, that added together give a palindrome (212121212).

The spelling of 100212121112 in words is "one hundred billion, two hundred twelve million, one hundred twenty-one thousand, one hundred twelve".