213231011109 has 4 divisors (see below), whose sum is σ = 284308014816. Its totient is φ = 142154007404.

The previous prime is 213231011107. The next prime is 213231011111. The reversal of 213231011109 is 901110132312.

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 an interprime number because it is at equal distance from previous prime (213231011107) and next prime (213231011111).

It is a cyclic number.

It is not a de Polignac number, because 213231011109 - 2¹ = 213231011107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213231011107) 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, 35538501849 + ... + 35538501854.

It is an arithmetic number, because the mean of its divisors is an integer number (71077003704).

Almost surely, 2^213231011109 is an apocalyptic number.

It is an amenable number.

213231011109 is a deficient number, since it is larger than the sum of its proper divisors (71077003707).

213231011109 is an equidigital number, since it uses as much as digits as its factorization.

213231011109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71077003706.

The product of its (nonzero) digits is 324, while the sum is 24.

The spelling of 213231011109 in words is "two hundred thirteen billion, two hundred thirty-one million, eleven thousand, one hundred nine".