213211123333123 has 4 divisors (see below), whose sum is σ = 213211155932280. Its totient is φ = 213211090733968.

The previous prime is 213211123333073. The next prime is 213211123333139. The reversal of 213211123333123 is 321333321112312.

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

It is a cyclic number.

It is not a de Polignac number, because 213211123333123 - 2¹³ = 213211123324931 is a prime.

It is a super-2 number, since 2×213211123333123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213211123333223) 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, 2715133 + ... + 20827726.

It is an arithmetic number, because the mean of its divisors is an integer number (53302788983070).

Almost surely, 2^{213211123333123} is an apocalyptic number.

213211123333123 is a deficient number, since it is larger than the sum of its proper divisors (32599157).

213211123333123 is an equidigital number, since it uses as much as digits as its factorization.

213211123333123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32599156.

The product of its digits is 11664, while the sum is 31.

Adding to 213211123333123 its reverse (321333321112312), we get a palindrome (534544444445435).

The spelling of 213211123333123 in words is "two hundred thirteen trillion, two hundred eleven billion, one hundred twenty-three million, three hundred thirty-three thousand, one hundred twenty-three".