2111403221 has 2 divisors, whose sum is σ = 2111403222. Its totient is φ = 2111403220.

The previous prime is 2111403181. The next prime is 2111403223. The reversal of 2111403221 is 1223041112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1333272196 + 778131025 = 36514^2 + 27895^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111403221 - 2³⁰ = 1037661397 is a prime.

Together with 2111403223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2111403221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111403223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055701610 + 1055701611.

It is an arithmetic number, because the mean of its divisors is an integer number (1055701611).

Almost surely, 2^2111403221 is an apocalyptic number.

It is an amenable number.

2111403221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111403221 is an equidigital number, since it uses as much as digits as its factorization.

2111403221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 2111403221 is about 45950.0078454836. The cubic root of 2111403221 is about 1282.8928753409.

Adding to 2111403221 its reverse (1223041112), we get a palindrome (3334444333).

The spelling of 2111403221 in words is "two billion, one hundred eleven million, four hundred three thousand, two hundred twenty-one".