1321223211 has 48 divisors (see below), whose sum is σ = 2483959680. Its totient is φ = 686342160.

The previous prime is 1321223207. The next prime is 1321223213. The reversal of 1321223211 is 1123221231.

1321223211 is a `hidden beast` number, since 1 + 321 + 22 + 321 + 1 = 666.

It is not a de Polignac number, because 1321223211 - 2² = 1321223207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321223213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30841 + ... + 59946.

It is an arithmetic number, because the mean of its divisors is an integer number (51749160).

Almost surely, 2^1321223211 is an apocalyptic number.

1321223211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1321223211 is a deficient number, since it is larger than the sum of its proper divisors (1162736469).

1321223211 is a wasteful number, since it uses less digits than its factorization.

1321223211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90821 (or 90808 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1321223211 is about 36348.6342384415. The cubic root of 1321223211 is about 1097.3000480823.

Adding to 1321223211 its reverse (1123221231), we get a palindrome (2444444442).

The spelling of 1321223211 in words is "one billion, three hundred twenty-one million, two hundred twenty-three thousand, two hundred eleven".