220020220129 has 4 divisors (see below), whose sum is σ = 220771142676. Its totient is φ = 219269297584.

The previous prime is 220020220111. The next prime is 220020220141. The reversal of 220020220129 is 921022020022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 95312360529 + 124707859600 = 308727^2 + 353140^2 .

It is a cyclic number.

It is not a de Polignac number, because 220020220129 - 2¹³ = 220020211937 is a prime.

It is a super-2 number, since 2×220020220129² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220020220109) 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 3 ways as a sum of consecutive naturals, for example, 375460834 + ... + 375461419.

It is an arithmetic number, because the mean of its divisors is an integer number (55192785669).

Almost surely, 2^220020220129 is an apocalyptic number.

It is an amenable number.

220020220129 is a deficient number, since it is larger than the sum of its proper divisors (750922547).

220020220129 is an equidigital number, since it uses as much as digits as its factorization.

220020220129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750922546.

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 220020220129 in words is "two hundred twenty billion, twenty million, two hundred twenty thousand, one hundred twenty-nine".