220112212020221 has 4 divisors (see below), whose sum is σ = 221056899625692. Its totient is φ = 219167524414752.

The previous prime is 220112212020209. The next prime is 220112212020341. The reversal of 220112212020221 is 122020212211022.

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 140368919412121 + 79743292608100 = 11847739^2 + 8929910^2 .

It is a cyclic number.

It is not a de Polignac number, because 220112212020221 - 2¹⁴ = 220112212003837 is a prime.

It is a super-2 number, since 2×220112212020221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220112212020193 and 220112212020202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220112212020721) 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, 472343802386 + ... + 472343802851.

It is an arithmetic number, because the mean of its divisors is an integer number (55264224906423).

Almost surely, 2^{220112212020221} is an apocalyptic number.

It is an amenable number.

220112212020221 is a deficient number, since it is larger than the sum of its proper divisors (944687605471).

220112212020221 is an equidigital number, since it uses as much as digits as its factorization.

220112212020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944687605470.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 220112212020221 its reverse (122020212211022), we get a palindrome (342132424231243).

The spelling of 220112212020221 in words is "two hundred twenty trillion, one hundred twelve billion, two hundred twelve million, twenty thousand, two hundred twenty-one".