2111004221 has 4 divisors (see below), whose sum is σ = 2183797500. Its totient is φ = 2038210944.

The previous prime is 2111004197. The next prime is 2111004229. The reversal of 2111004221 is 1224001112.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1210344100 + 900660121 = 34790^2 + 30011^2 .

It is not a de Polignac number, because 2111004221 - 2¹⁸ = 2110742077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2111004196 and 2111004205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111004229) 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, 36396596 + ... + 36396653.

It is an arithmetic number, because the mean of its divisors is an integer number (545949375).

Almost surely, 2^2111004221 is an apocalyptic number.

It is an amenable number.

2111004221 is a deficient number, since it is larger than the sum of its proper divisors (72793279).

2111004221 is an equidigital number, since it uses as much as digits as its factorization.

2111004221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72793278.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2111004221 is about 45945.6659653552. The cubic root of 2111004221 is about 1282.8120591805.

Adding to 2111004221 its reverse (1224001112), we get a palindrome (3335005333).

The spelling of 2111004221 in words is "two billion, one hundred eleven million, four thousand, two hundred twenty-one".