211231323013 has 4 divisors (see below), whose sum is σ = 212115136320. Its totient is φ = 210347509708.

The previous prime is 211231322999. The next prime is 211231323029. The reversal of 211231323013 is 310323132112.

211231323013 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 a de Polignac number, because none of the positive numbers 2^k-211231323013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211231323073) 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, 441906295 + ... + 441906772.

It is an arithmetic number, because the mean of its divisors is an integer number (53028784080).

Almost surely, 2^211231323013 is an apocalyptic number.

It is an amenable number.

211231323013 is a deficient number, since it is larger than the sum of its proper divisors (883813307).

211231323013 is an equidigital number, since it uses as much as digits as its factorization.

211231323013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883813306.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 211231323013 its reverse (310323132112), we get a palindrome (521554455125).

The spelling of 211231323013 in words is "two hundred eleven billion, two hundred thirty-one million, three hundred twenty-three thousand, thirteen".