220011013031021 has 4 divisors (see below), whose sum is σ = 225957256626492. Its totient is φ = 214064769435552.

The previous prime is 220011013030987. The next prime is 220011013031111. The reversal of 220011013031021 is 120130310110022.

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 181231125008521 + 38779888022500 = 13462211^2 + 6227350^2 .

It is a cyclic number.

It is not a de Polignac number, because 220011013031021 - 2⁴² = 215612966519917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220011013031321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2973121797680 + ... + 2973121797753.

It is an arithmetic number, because the mean of its divisors is an integer number (56489314156623).

Almost surely, 2^{220011013031021} is an apocalyptic number.

It is an amenable number.

220011013031021 is a deficient number, since it is larger than the sum of its proper divisors (5946243595471).

220011013031021 is an equidigital number, since it uses as much as digits as its factorization.

220011013031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5946243595470.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 220011013031021 its reverse (120130310110022), we get a palindrome (340141323141043).

The spelling of 220011013031021 in words is "two hundred twenty trillion, eleven billion, thirteen million, thirty-one thousand, twenty-one".