1220323120001 has 4 divisors (see below), whose sum is σ = 1220506001412. Its totient is φ = 1220140238592.

The previous prime is 1220323119971. The next prime is 1220323120021. The reversal of 1220323120001 is 1000213230221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 256344753025 + 963978366976 = 506305^2 + 981824^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220323120001 - 2³⁸ = 945445213057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1220323120021) 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, 91430696 + ... + 91444041.

It is an arithmetic number, because the mean of its divisors is an integer number (305126500353).

Almost surely, 2^{1220323120001} is an apocalyptic number.

It is an amenable number.

1220323120001 is a deficient number, since it is larger than the sum of its proper divisors (182881411).

1220323120001 is an equidigital number, since it uses as much as digits as its factorization.

1220323120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182881410.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1220323120001 its reverse (1000213230221), we get a palindrome (2220536350222).

The spelling of 1220323120001 in words is "one trillion, two hundred twenty billion, three hundred twenty-three million, one hundred twenty thousand, one".