1220123133001 has 4 divisors (see below), whose sum is σ = 1220298722500. Its totient is φ = 1219947543504.

The previous prime is 1220123132993. The next prime is 1220123133023. The reversal of 1220123133001 is 1003313210221.

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 894681407376 + 325441725625 = 945876^2 + 570475^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220123133001 - 2³ = 1220123132993 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 1220123133001.

It is not an unprimeable number, because it can be changed into a prime (1220123193001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87784326 + ... + 87798223.

It is an arithmetic number, because the mean of its divisors is an integer number (305074680625).

Almost surely, 2^{1220123133001} is an apocalyptic number.

It is an amenable number.

1220123133001 is a deficient number, since it is larger than the sum of its proper divisors (175589499).

1220123133001 is an equidigital number, since it uses as much as digits as its factorization.

1220123133001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175589498.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1220123133001 its reverse (1003313210221), we get a palindrome (2223436343222).

The spelling of 1220123133001 in words is "one trillion, two hundred twenty billion, one hundred twenty-three million, one hundred thirty-three thousand, one".