221220022021211 has 4 divisors (see below), whose sum is σ = 221225349969624. Its totient is φ = 221214694072800.

The previous prime is 221220022021199. The next prime is 221220022021261. The reversal of 221220022021211 is 112120220022122.

221220022021211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221220022021211 - 2²⁶ = 221219954912347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221220022021261) 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, 2663911925 + ... + 2663994966.

It is an arithmetic number, because the mean of its divisors is an integer number (55306337492406).

Almost surely, 2^{221220022021211} is an apocalyptic number.

221220022021211 is a deficient number, since it is larger than the sum of its proper divisors (5327948413).

221220022021211 is an equidigital number, since it uses as much as digits as its factorization.

221220022021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5327948412.

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

Adding to 221220022021211 its reverse (112120220022122), we get a palindrome (333340242043333).

The spelling of 221220022021211 in words is "two hundred twenty-one trillion, two hundred twenty billion, twenty-two million, twenty-one thousand, two hundred eleven".