211223331331 has 24 divisors (see below), whose sum is σ = 225581045760. Its totient is φ = 197735594112.

The previous prime is 211223331307. The next prime is 211223331337. The reversal of 211223331331 is 133133322112.

It is not a de Polignac number, because 211223331331 - 2⁹ = 211223330819 is a prime.

It is a super-2 number, since 2×211223331331² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211223331296 and 211223331305.

It is not an unprimeable number, because it can be changed into a prime (211223331337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98563246 + ... + 98565388.

It is an arithmetic number, because the mean of its divisors is an integer number (9399210240).

Almost surely, 2^211223331331 is an apocalyptic number.

211223331331 is a deficient number, since it is larger than the sum of its proper divisors (14357714429).

211223331331 is a wasteful number, since it uses less digits than its factorization.

211223331331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3843 (or 3826 counting only the distinct ones).

The product of its digits is 1944, while the sum is 25.

Adding to 211223331331 its reverse (133133322112), we get a palindrome (344356653443).

The spelling of 211223331331 in words is "two hundred eleven billion, two hundred twenty-three million, three hundred thirty-one thousand, three hundred thirty-one".