220011101221 has 4 divisors (see below), whose sum is σ = 220022468992. Its totient is φ = 219999733452.

The previous prime is 220011101171. The next prime is 220011101287. The reversal of 220011101221 is 122101110022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220011101221 - 2¹¹ = 220011099173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220011108221) 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, 5654805 + ... + 5693578.

It is an arithmetic number, because the mean of its divisors is an integer number (55005617248).

Almost surely, 2^220011101221 is an apocalyptic number.

It is an amenable number.

220011101221 is a deficient number, since it is larger than the sum of its proper divisors (11367771).

220011101221 is a wasteful number, since it uses less digits than its factorization.

220011101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11367770.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 220011101221 its reverse (122101110022), we get a palindrome (342112211243).

The spelling of 220011101221 in words is "two hundred twenty billion, eleven million, one hundred one thousand, two hundred twenty-one".