220102001 has 4 divisors (see below), whose sum is σ = 251545152. Its totient is φ = 188658852.

The previous prime is 220101989. The next prime is 220102007. The reversal of 220102001 is 100201022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220102001 - 2¹⁴ = 220085617 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 220102001.

It is not an unprimeable number, because it can be changed into a prime (220102007) 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, 15721565 + ... + 15721578.

It is an arithmetic number, because the mean of its divisors is an integer number (62886288).

Almost surely, 2^220102001 is an apocalyptic number.

It is an amenable number.

220102001 is a deficient number, since it is larger than the sum of its proper divisors (31443151).

220102001 is an equidigital number, since it uses as much as digits as its factorization.

220102001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31443150.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 220102001 is about 14835.8350287404. The cubic root of 220102001 is about 603.7743563453.

Adding to 220102001 its reverse (100201022), we get a palindrome (320303023).

The spelling of 220102001 in words is "two hundred twenty million, one hundred two thousand, one".