1221303212323 has 8 divisors (see below), whose sum is σ = 1233577863648. Its totient is φ = 1209036586944.

The previous prime is 1221303212309. The next prime is 1221303212333. The reversal of 1221303212323 is 3232123031221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221303212323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221303212333) 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, 1700386 + ... + 2309527.

It is an arithmetic number, because the mean of its divisors is an integer number (154197232956).

Almost surely, 2^{1221303212323} is an apocalyptic number.

1221303212323 is a deficient number, since it is larger than the sum of its proper divisors (12274651325).

1221303212323 is a wasteful number, since it uses less digits than its factorization.

1221303212323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4012973.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1221303212323 its reverse (3232123031221), we get a palindrome (4453426243544).

The spelling of 1221303212323 in words is "one trillion, two hundred twenty-one billion, three hundred three million, two hundred twelve thousand, three hundred twenty-three".