1220129343 has 24 divisors (see below), whose sum is σ = 1806446928. Its totient is φ = 793158912.

The previous prime is 1220129333. The next prime is 1220129363. The reversal of 1220129343 is 3439210221.

It is a happy number.

It is not a de Polignac number, because 1220129343 - 2⁵ = 1220129311 is a prime.

It is a super-2 number, since 2×1220129343² = 2977431227299223298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220129303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 259671 + ... + 264327.

It is an arithmetic number, because the mean of its divisors is an integer number (75268622).

Almost surely, 2^1220129343 is an apocalyptic number.

1220129343 is a deficient number, since it is larger than the sum of its proper divisors (586317585).

1220129343 is a wasteful number, since it uses less digits than its factorization.

1220129343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5383 (or 5380 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 1220129343 is about 34930.3498837329. The cubic root of 1220129343 is about 1068.5674902464.

Adding to 1220129343 its reverse (3439210221), we get a palindrome (4659339564).

The spelling of 1220129343 in words is "one billion, two hundred twenty million, one hundred twenty-nine thousand, three hundred forty-three".