220001021001 has 32 divisors (see below), whose sum is σ = 334055715840. Its totient is φ = 143013456000.

The previous prime is 220001020991. The next prime is 220001021003. The reversal of 220001021001 is 100120100022.

It is not a de Polignac number, because 220001021001 - 2⁹ = 220001020489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (220001021003) 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 31 ways as a sum of consecutive naturals, for example, 2052136 + ... + 2156678.

It is an arithmetic number, because the mean of its divisors is an integer number (10439241120).

Almost surely, 2^220001021001 is an apocalyptic number.

It is an amenable number.

220001021001 is a deficient number, since it is larger than the sum of its proper divisors (114054694839).

220001021001 is a wasteful number, since it uses less digits than its factorization.

220001021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106494 (or 106488 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 220001021001 its reverse (100120100022), we get a palindrome (320121121023).

The spelling of 220001021001 in words is "two hundred twenty billion, one million, twenty-one thousand, one".