1220116427 has 6 divisors (see below), whose sum is σ = 1223653788. Its totient is φ = 1216589252.

The previous prime is 1220116411. The next prime is 1220116439. The reversal of 1220116427 is 7246110221.

It is not a de Polignac number, because 1220116427 - 2⁴ = 1220116411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220116396 and 1220116405.

It is not an unprimeable number, because it can be changed into a prime (1220116487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124148 + ... + 133614.

It is an arithmetic number, because the mean of its divisors is an integer number (203942298).

Almost surely, 2^1220116427 is an apocalyptic number.

1220116427 is a deficient number, since it is larger than the sum of its proper divisors (3537361).

1220116427 is an frugal number, since it uses more digits than its factorization.

1220116427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10185 (or 9826 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1220116427 is about 34930.1650010417. The cubic root of 1220116427 is about 1068.5637196991.

Adding to 1220116427 its reverse (7246110221), we get a palindrome (8466226648).

The spelling of 1220116427 in words is "one billion, two hundred twenty million, one hundred sixteen thousand, four hundred twenty-seven".