1211321223 has 48 divisors (see below), whose sum is σ = 2122055936. Its totient is φ = 676045440.

The previous prime is 1211321219. The next prime is 1211321233. The reversal of 1211321223 is 3221231121.

1211321223 is a `hidden beast` number, since 121 + 1 + 321 + 223 = 666.

It is not a de Polignac number, because 1211321223 - 2² = 1211321219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211321196 and 1211321205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211321203) 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, 64863 + ... + 81423.

Almost surely, 2^1211321223 is an apocalyptic number.

1211321223 is a deficient number, since it is larger than the sum of its proper divisors (910734713).

1211321223 is an equidigital number, since it uses as much as digits as its factorization.

1211321223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16626 (or 16614 counting only the distinct ones).

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

The square root of 1211321223 is about 34804.0403258013. The cubic root of 1211321223 is about 1065.9899464243.

Adding to 1211321223 its reverse (3221231121), we get a palindrome (4432552344).

The spelling of 1211321223 in words is "one billion, two hundred eleven million, three hundred twenty-one thousand, two hundred twenty-three".