213311110331 has 4 divisors (see below), whose sum is σ = 232703029464. Its totient is φ = 193919191200.

The previous prime is 213311110303. The next prime is 213311110339. The reversal of 213311110331 is 133011113312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213311110331 is a prime.

It is a super-2 number, since 2×213311110331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213311110339) 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, 9695959550 + ... + 9695959571.

It is an arithmetic number, because the mean of its divisors is an integer number (58175757366).

Almost surely, 2^213311110331 is an apocalyptic number.

213311110331 is a deficient number, since it is larger than the sum of its proper divisors (19391919133).

213311110331 is a wasteful number, since it uses less digits than its factorization.

213311110331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19391919132.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 213311110331 its reverse (133011113312), we get a palindrome (346322223643).

The spelling of 213311110331 in words is "two hundred thirteen billion, three hundred eleven million, one hundred ten thousand, three hundred thirty-one".