1221231322323 has 24 divisors (see below), whose sum is σ = 1793543897808. Its totient is φ = 800562578112.

The previous prime is 1221231322309. The next prime is 1221231322403. The reversal of 1221231322323 is 3232231321221.

1221231322323 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 2 + 313 + 22 + 323 = 666.

It is not a de Polignac number, because 1221231322323 - 2⁹ = 1221231321811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221231322123) 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, 1482136 + ... + 2153877.

It is an arithmetic number, because the mean of its divisors is an integer number (74730995742).

Almost surely, 2^{1221231322323} is an apocalyptic number.

1221231322323 is a deficient number, since it is larger than the sum of its proper divisors (572312575485).

1221231322323 is a wasteful number, since it uses less digits than its factorization.

1221231322323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3636643 (or 3636640 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 1221231322323 its reverse (3232231321221), we get a palindrome (4453462643544).

The spelling of 1221231322323 in words is "one trillion, two hundred twenty-one billion, two hundred thirty-one million, three hundred twenty-two thousand, three hundred twenty-three".