213231021113 has 4 divisors (see below), whose sum is σ = 232615659408. Its totient is φ = 193846382820.

The previous prime is 213231021079. The next prime is 213231021119. The reversal of 213231021113 is 311120132312.

It is a happy number.

213231021113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213231021113 - 2¹⁰ = 213231020089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213231021119) 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, 9692319131 + ... + 9692319152.

It is an arithmetic number, because the mean of its divisors is an integer number (58153914852).

Almost surely, 2^213231021113 is an apocalyptic number.

It is an amenable number.

213231021113 is a deficient number, since it is larger than the sum of its proper divisors (19384638295).

213231021113 is a wasteful number, since it uses less digits than its factorization.

213231021113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19384638294.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 213231021113 its reverse (311120132312), we get a palindrome (524351153425).

The spelling of 213231021113 in words is "two hundred thirteen billion, two hundred thirty-one million, twenty-one thousand, one hundred thirteen".