212121110102 has 16 divisors (see below), whose sum is σ = 359076488400. Its totient is φ = 93093903840.

The previous prime is 212121110101. The next prime is 212121110129. The reversal of 212121110102 is 201011121212.

212121110102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×212121110102⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121110101) 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, 166238477 + ... + 166239752.

It is an arithmetic number, because the mean of its divisors is an integer number (22442280525).

Almost surely, 2^212121110102 is an apocalyptic number.

212121110102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212121110102 is a deficient number, since it is larger than the sum of its proper divisors (146955378298).

212121110102 is a wasteful number, since it uses less digits than its factorization.

212121110102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332478271.

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

Adding to 212121110102 its reverse (201011121212), we get a palindrome (413132231314).

It can be divided in two parts, 212121110 and 102, that added together give a palindrome (212121212).

The spelling of 212121110102 in words is "two hundred twelve billion, one hundred twenty-one million, one hundred ten thousand, one hundred two".