1221000322323 has 8 divisors (see below), whose sum is σ = 1634987557008. Its totient is φ = 810506651264.

The previous prime is 1221000322277. The next prime is 1221000322379. The reversal of 1221000322323 is 3232230001221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221000322323 - 2⁹ = 1221000321811 is a prime.

It is a super-2 number, since 2×1221000322323² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1221000322323.

It is not an unprimeable number, because it can be changed into a prime (1221000322123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 873390090 + ... + 873391487.

It is an arithmetic number, because the mean of its divisors is an integer number (204373444626).

Almost surely, 2^{1221000322323} is an apocalyptic number.

1221000322323 is a deficient number, since it is larger than the sum of its proper divisors (413987234685).

1221000322323 is a wasteful number, since it uses less digits than its factorization.

1221000322323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746781813.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 1221000322323 its reverse (3232230001221), we get a palindrome (4453230323544).

The spelling of 1221000322323 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-two thousand, three hundred twenty-three".