212121230113 has 4 divisors (see below), whose sum is σ = 228438247828. Its totient is φ = 195804212400.

The previous prime is 212121230107. The next prime is 212121230143. The reversal of 212121230113 is 311032121212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130344105024 + 81777125089 = 361032^2 + 285967^2 .

It is a cyclic number.

It is not a de Polignac number, because 212121230113 - 2¹⁷ = 212121099041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212121230143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8158508838 + ... + 8158508863.

It is an arithmetic number, because the mean of its divisors is an integer number (57109561957).

Almost surely, 2^212121230113 is an apocalyptic number.

It is an amenable number.

212121230113 is a deficient number, since it is larger than the sum of its proper divisors (16317017715).

212121230113 is a wasteful number, since it uses less digits than its factorization.

212121230113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16317017714.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 212121230113 its reverse (311032121212), we get a palindrome (523153351325).

The spelling of 212121230113 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred thirty thousand, one hundred thirteen".