1001220001323 has 4 divisors (see below), whose sum is σ = 1334960001768. Its totient is φ = 667480000880.

The previous prime is 1001220001321. The next prime is 1001220001351. The reversal of 1001220001323 is 3231000221001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1001220001323 - 2¹ = 1001220001321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001220001321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166870000218 + ... + 166870000223.

It is an arithmetic number, because the mean of its divisors is an integer number (333740000442).

Almost surely, 2^{1001220001323} is an apocalyptic number.

1001220001323 is a deficient number, since it is larger than the sum of its proper divisors (333740000445).

1001220001323 is an equidigital number, since it uses as much as digits as its factorization.

1001220001323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333740000444.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1001220001323 its reverse (3231000221001), we get a palindrome (4232220222324).

The spelling of 1001220001323 in words is "one trillion, one billion, two hundred twenty million, one thousand, three hundred twenty-three".