211223100331 has 2 divisors, whose sum is σ = 211223100332. Its totient is φ = 211223100330.

The previous prime is 211223100323. The next prime is 211223100343. The reversal of 211223100331 is 133001322112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211223100331 - 2³ = 211223100323 is a prime.

It is a super-2 number, since 2×211223100331² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211223100299 and 211223100308.

It is not a weakly prime, because it can be changed into another prime (211223100371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611550165 + 105611550166.

It is an arithmetic number, because the mean of its divisors is an integer number (105611550166).

Almost surely, 2^211223100331 is an apocalyptic number.

211223100331 is a deficient number, since it is larger than the sum of its proper divisors (1).

211223100331 is an equidigital number, since it uses as much as digits as its factorization.

211223100331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 211223100331 its reverse (133001322112), we get a palindrome (344224422443).

The spelling of 211223100331 in words is "two hundred eleven billion, two hundred twenty-three million, one hundred thousand, three hundred thirty-one".