2111225221 has 12 divisors (see below), whose sum is σ = 2456663520. Its totient is φ = 1809070200.

The previous prime is 2111225219. The next prime is 2111225243. The reversal of 2111225221 is 1225221112.

It is a happy number.

It is not a de Polignac number, because 2111225221 - 2¹ = 2111225219 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111225021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 312760 + ... + 319438.

It is an arithmetic number, because the mean of its divisors is an integer number (204721960).

Almost surely, 2^2111225221 is an apocalyptic number.

It is an amenable number.

2111225221 is a deficient number, since it is larger than the sum of its proper divisors (345438299).

2111225221 is an equidigital number, since it uses as much as digits as its factorization.

2111225221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13144 (or 13137 counting only the distinct ones).

The product of its digits is 160, while the sum is 19.

The square root of 2111225221 is about 45948.0709170690. The cubic root of 2111225221 is about 1282.8568232743.

Adding to 2111225221 its reverse (1225221112), we get a palindrome (3336446333).

The spelling of 2111225221 in words is "two billion, one hundred eleven million, two hundred twenty-five thousand, two hundred twenty-one".