211221331323 has 32 divisors (see below), whose sum is σ = 292726597632. Its totient is φ = 135329875200.

The previous prime is 211221331309. The next prime is 211221331333. The reversal of 211221331323 is 323133122112.

It is not a de Polignac number, because 211221331323 - 2¹⁴ = 211221314939 is a prime.

It is a super-2 number, since 2×211221331323² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211221331293 and 211221331302.

It is not an unprimeable number, because it can be changed into a prime (211221331333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15068388 + ... + 15082398.

It is an arithmetic number, because the mean of its divisors is an integer number (9147706176).

Almost surely, 2^211221331323 is an apocalyptic number.

211221331323 is a deficient number, since it is larger than the sum of its proper divisors (81505266309).

211221331323 is a wasteful number, since it uses less digits than its factorization.

211221331323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15155.

The product of its digits is 1296, while the sum is 24.

Adding to 211221331323 its reverse (323133122112), we get a palindrome (534354453435).

The spelling of 211221331323 in words is "two hundred eleven billion, two hundred twenty-one million, three hundred thirty-one thousand, three hundred twenty-three".