1221313130323 has 8 divisors (see below), whose sum is σ = 1434829412016. Its totient is φ = 1024878151200.

The previous prime is 1221313130293. The next prime is 1221313130339. The reversal of 1221313130323 is 3230313131221.

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 1221313130323 - 2²¹ = 1221311033171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221313130383) 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, 4270325488 + ... + 4270325773.

It is an arithmetic number, because the mean of its divisors is an integer number (179353676502).

Almost surely, 2^{1221313130323} is an apocalyptic number.

1221313130323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1221313130323 is a deficient number, since it is larger than the sum of its proper divisors (213516281693).

1221313130323 is a wasteful number, since it uses less digits than its factorization.

1221313130323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8540651285.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 1221313130323 its reverse (3230313131221), we get a palindrome (4451626261544).

The spelling of 1221313130323 in words is "one trillion, two hundred twenty-one billion, three hundred thirteen million, one hundred thirty thousand, three hundred twenty-three".