220212012210221 has 4 divisors (see below), whose sum is σ = 222160791079452. Its totient is φ = 218263233340992.

The previous prime is 220212012210217. The next prime is 220212012210301. The reversal of 220212012210221 is 122012210212022.

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 81090223110121 + 139121789100100 = 9005011^2 + 11794990^2 .

It is a cyclic number.

It is not a de Polignac number, because 220212012210221 - 2² = 220212012210217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220212012210193 and 220212012210202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220212042210221) 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, 974389434446 + ... + 974389434671.

It is an arithmetic number, because the mean of its divisors is an integer number (55540197769863).

Almost surely, 2^{220212012210221} is an apocalyptic number.

It is an amenable number.

220212012210221 is a deficient number, since it is larger than the sum of its proper divisors (1948778869231).

220212012210221 is a wasteful number, since it uses less digits than its factorization.

220212012210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948778869230.

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

Adding to 220212012210221 its reverse (122012210212022), we get a palindrome (342224222422243).

The spelling of 220212012210221 in words is "two hundred twenty trillion, two hundred twelve billion, twelve million, two hundred ten thousand, two hundred twenty-one".