1220020329 has 16 divisors (see below), whose sum is σ = 1779275520. Its totient is φ = 737447760.

The previous prime is 1220020327. The next prime is 1220020339. The reversal of 1220020329 is 9230200221.

It is not a de Polignac number, because 1220020329 - 2¹ = 1220020327 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220020327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36267 + ... + 61280.

It is an arithmetic number, because the mean of its divisors is an integer number (111204720).

Almost surely, 2^1220020329 is an apocalyptic number.

It is an amenable number.

1220020329 is a deficient number, since it is larger than the sum of its proper divisors (559255191).

1220020329 is a wasteful number, since it uses less digits than its factorization.

1220020329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97940.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1220020329 is about 34928.7894007221. The cubic root of 1220020329 is about 1068.5356651271.

The spelling of 1220020329 in words is "one billion, two hundred twenty million, twenty thousand, three hundred twenty-nine".