1220523440311 has 16 divisors (see below), whose sum is σ = 1469265510400. Its totient is φ = 1012415748120.

The previous prime is 1220523440273. The next prime is 1220523440327. The reversal of 1220523440311 is 1130443250221.

It is not a de Polignac number, because 1220523440311 - 2¹¹ = 1220523438263 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 1220523440311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220523449311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57382551 + ... + 57403816.

It is an arithmetic number, because the mean of its divisors is an integer number (91829094400).

Almost surely, 2^{1220523440311} is an apocalyptic number.

1220523440311 is a deficient number, since it is larger than the sum of its proper divisors (248742070089).

1220523440311 is an equidigital number, since it uses as much as digits as its factorization.

1220523440311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114786419 (or 114786405 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 1220523440311 its reverse (1130443250221), we get a palindrome (2350966690532).

The spelling of 1220523440311 in words is "one trillion, two hundred twenty billion, five hundred twenty-three million, four hundred forty thousand, three hundred eleven".