213221113331 has 2 divisors, whose sum is σ = 213221113332. Its totient is φ = 213221113330.

The previous prime is 213221113297. The next prime is 213221113367. The reversal of 213221113331 is 133311122312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213221113331 is a prime.

It is a super-2 number, since 2×213221113331² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213221113297 and 213221113306.

It is not a weakly prime, because it can be changed into another prime (213221110331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106610556665 + 106610556666.

It is an arithmetic number, because the mean of its divisors is an integer number (106610556666).

Almost surely, 2^213221113331 is an apocalyptic number.

213221113331 is a deficient number, since it is larger than the sum of its proper divisors (1).

213221113331 is an equidigital number, since it uses as much as digits as its factorization.

213221113331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

Adding to 213221113331 its reverse (133311122312), we get a palindrome (346532235643).

The spelling of 213221113331 in words is "two hundred thirteen billion, two hundred twenty-one million, one hundred thirteen thousand, three hundred thirty-one".