220101021001 has 4 divisors (see below), whose sum is σ = 221373281412. Its totient is φ = 218828760592.

The previous prime is 220101020989. The next prime is 220101021017. The reversal of 220101021001 is 100120101022.

220101021001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 144057443401 + 76043577600 = 379549^2 + 275760^2 .

It is a cyclic number.

It is not a de Polignac number, because 220101021001 - 2¹⁷ = 220100889929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220101021061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636129946 + ... + 636130291.

It is an arithmetic number, because the mean of its divisors is an integer number (55343320353).

Almost surely, 2^220101021001 is an apocalyptic number.

It is an amenable number.

220101021001 is a deficient number, since it is larger than the sum of its proper divisors (1272260411).

220101021001 is a wasteful number, since it uses less digits than its factorization.

220101021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272260410.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 220101021001 its reverse (100120101022), we get a palindrome (320221122023).

The spelling of 220101021001 in words is "two hundred twenty billion, one hundred one million, twenty-one thousand, one".