213231111103333 has 4 divisors (see below), whose sum is σ = 213553699774348. Its totient is φ = 212908522432320.

The previous prime is 213231111103289. The next prime is 213231111103447. The reversal of 213231111103333 is 333301111132312.

It is a happy number.

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 169572015208324 + 43659095895009 = 13021982^2 + 6607503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213231111103333 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 (213231111100333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161294334516 + ... + 161294335837.

It is an arithmetic number, because the mean of its divisors is an integer number (53388424943587).

Almost surely, 2^{213231111103333} is an apocalyptic number.

It is an amenable number.

213231111103333 is a deficient number, since it is larger than the sum of its proper divisors (322588671015).

213231111103333 is an equidigital number, since it uses as much as digits as its factorization.

213231111103333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322588671014.

The product of its (nonzero) digits is 2916, while the sum is 28.

Adding to 213231111103333 its reverse (333301111132312), we get a palindrome (546532222235645).

The spelling of 213231111103333 in words is "two hundred thirteen trillion, two hundred thirty-one billion, one hundred eleven million, one hundred three thousand, three hundred thirty-three".