220120210211021 has 6 divisors (see below), whose sum is σ = 227449915442766. Its totient is φ = 213019558267800.

The previous prime is 220120210210907. The next prime is 220120210211039. The reversal of 220120210211021 is 120112012021022.

It can be written as a sum of positive squares in only one way, i.e., 159192600294025 + 60927609916996 = 12617155^2 + 7805614^2 .

It is not a de Polignac number, because 220120210211021 - 2³⁸ = 219845332304077 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 (220120210211071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114526643270 + ... + 114526645191.

It is an arithmetic number, because the mean of its divisors is an integer number (37908319240461).

Almost surely, 2^{220120210211021} is an apocalyptic number.

It is an amenable number.

220120210211021 is a deficient number, since it is larger than the sum of its proper divisors (7329705231745).

220120210211021 is an equidigital number, since it uses as much as digits as its factorization.

220120210211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229053288523 (or 229053288492 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 220120210211021 its reverse (120112012021022), we get a palindrome (340232222232043).

The spelling of 220120210211021 in words is "two hundred twenty trillion, one hundred twenty billion, two hundred ten million, two hundred eleven thousand, twenty-one".