220111021211 has 4 divisors (see below), whose sum is σ = 220122637800. Its totient is φ = 220099404624.

The previous prime is 220111021183. The next prime is 220111021279. The reversal of 220111021211 is 112120111022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220111021211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220111023211) 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, 5779826 + ... + 5817783.

It is an arithmetic number, because the mean of its divisors is an integer number (55030659450).

Almost surely, 2^220111021211 is an apocalyptic number.

220111021211 is a deficient number, since it is larger than the sum of its proper divisors (11616589).

220111021211 is a wasteful number, since it uses less digits than its factorization.

220111021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11616588.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 220111021211 its reverse (112120111022), we get a palindrome (332231132233).

The spelling of 220111021211 in words is "two hundred twenty billion, one hundred eleven million, twenty-one thousand, two hundred eleven".