2220111220221 has 24 divisors (see below), whose sum is σ = 3395820966720. Its totient is φ = 1393779229056.

The previous prime is 2220111220219. The next prime is 2220111220231. The reversal of 2220111220221 is 1220221110222.

It is a happy number.

2220111220221 is a `hidden beast` number, since 2 + 220 + 1 + 1 + 1 + 220 + 221 = 666.

It is not a de Polignac number, because 2220111220221 - 2¹ = 2220111220219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2220111220194 and 2220111220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220111220231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38843020 + ... + 38900133.

It is an arithmetic number, because the mean of its divisors is an integer number (141492540280).

Almost surely, 2^{2220111220221} is an apocalyptic number.

It is an amenable number.

2220111220221 is a deficient number, since it is larger than the sum of its proper divisors (1175709746499).

2220111220221 is a wasteful number, since it uses less digits than its factorization.

2220111220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77743345 (or 77743342 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2220111220221 its reverse (1220221110222), we get a palindrome (3440332330443).

The spelling of 2220111220221 in words is "two trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty thousand, two hundred twenty-one".