221020221221211 has 16 divisors (see below), whose sum is σ = 310204141715840. Its totient is φ = 139591573560000.

The previous prime is 221020221221179. The next prime is 221020221221221. The reversal of 221020221221211 is 112122122020122.

It is not a de Polignac number, because 221020221221211 - 2⁵ = 221020221221179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221020221221221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89194071 + ... + 91638543.

It is an arithmetic number, because the mean of its divisors is an integer number (19387758857240).

Almost surely, 2^{221020221221211} is an apocalyptic number.

221020221221211 is a deficient number, since it is larger than the sum of its proper divisors (89183920494629).

221020221221211 is a wasteful number, since it uses less digits than its factorization.

221020221221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030746.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221020221221211 its reverse (112122122020122), we get a palindrome (333142343241333).

The spelling of 221020221221211 in words is "two hundred twenty-one trillion, twenty billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred eleven".