1221450243323 has 8 divisors (see below), whose sum is σ = 1243125578160. Its totient is φ = 1199807334880.

The previous prime is 1221450243283. The next prime is 1221450243373. The reversal of 1221450243323 is 3233420541221.

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 1221450243323 - 2⁶ = 1221450243259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221450243323.

It is not an unprimeable number, because it can be changed into a prime (1221450243373) 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, 8030588 + ... + 8181273.

It is an arithmetic number, because the mean of its divisors is an integer number (155390697270).

Almost surely, 2^{1221450243323} is an apocalyptic number.

1221450243323 is a deficient number, since it is larger than the sum of its proper divisors (21675334837).

1221450243323 is a wasteful number, since it uses less digits than its factorization.

1221450243323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16213197.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 1221450243323 its reverse (3233420541221), we get a palindrome (4454870784544).

The spelling of 1221450243323 in words is "one trillion, two hundred twenty-one billion, four hundred fifty million, two hundred forty-three thousand, three hundred twenty-three".