1220441512423 has 4 divisors (see below), whose sum is σ = 1394790299920. Its totient is φ = 1046092724928.

The previous prime is 1220441512421. The next prime is 1220441512463. The reversal of 1220441512423 is 3242151440221.

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 1220441512423 - 2¹ = 1220441512421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220441512421) 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, 87174393738 + ... + 87174393751.

It is an arithmetic number, because the mean of its divisors is an integer number (348697574980).

Almost surely, 2^{1220441512423} is an apocalyptic number.

1220441512423 is a deficient number, since it is larger than the sum of its proper divisors (174348787497).

1220441512423 is an equidigital number, since it uses as much as digits as its factorization.

1220441512423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174348787496.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 1220441512423 its reverse (3242151440221), we get a palindrome (4462592952644).

The spelling of 1220441512423 in words is "one trillion, two hundred twenty billion, four hundred forty-one million, five hundred twelve thousand, four hundred twenty-three".