212121012102 has 32 divisors (see below), whose sum is σ = 436193178624. Its totient is φ = 68727873600.

The previous prime is 212121012071. The next prime is 212121012109. The reversal of 212121012102 is 201210121212.

212121012102 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-3 number, since 3×212121012102³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212121012109) 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 15 ways as a sum of consecutive naturals, for example, 1524258 + ... + 1657589.

It is an arithmetic number, because the mean of its divisors is an integer number (13631036832).

Almost surely, 2^212121012102 is an apocalyptic number.

212121012102 is an abundant number, since it is smaller than the sum of its proper divisors (224072166522).

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

212121012102 is a wasteful number, since it uses less digits than its factorization.

212121012102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3182164.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212121012102 its reverse (201210121212), we get a palindrome (413331133314).

It can be divided in two parts, 2121210 and 12102, that added together give a palindrome (2133312).

The spelling of 212121012102 in words is "two hundred twelve billion, one hundred twenty-one million, twelve thousand, one hundred two".