220221121211 has 32 divisors (see below), whose sum is σ = 282880969728. Its totient is φ = 166632681600.

The previous prime is 220221121201. The next prime is 220221121223. The reversal of 220221121211 is 112121122022.

It is not a de Polignac number, because 220221121211 - 2³⁰ = 219147379387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220221121211.

It is not an unprimeable number, because it can be changed into a prime (220221121201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20717480 + ... + 20728106.

It is an arithmetic number, because the mean of its divisors is an integer number (8840030304).

Almost surely, 2^220221121211 is an apocalyptic number.

220221121211 is a deficient number, since it is larger than the sum of its proper divisors (62659848517).

220221121211 is a wasteful number, since it uses less digits than its factorization.

220221121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20571.

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

Adding to 220221121211 its reverse (112121122022), we get a palindrome (332342243233).

The spelling of 220221121211 in words is "two hundred twenty billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred eleven".