2111304121 has 2 divisors, whose sum is σ = 2111304122. Its totient is φ = 2111304120.

The previous prime is 2111304119. The next prime is 2111304127. The reversal of 2111304121 is 1214031112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2077536400 + 33767721 = 45580^2 + 5811^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111304121 - 2¹ = 2111304119 is a prime.

Together with 2111304119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2111304095 and 2111304104.

It is not a weakly prime, because it can be changed into another prime (2111304127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055652060 + 1055652061.

It is an arithmetic number, because the mean of its divisors is an integer number (1055652061).

Almost surely, 2^2111304121 is an apocalyptic number.

It is an amenable number.

2111304121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111304121 is an equidigital number, since it uses as much as digits as its factorization.

2111304121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 2111304121 is about 45948.9294869859. The cubic root of 2111304121 is about 1282.8728039066.

Adding to 2111304121 its reverse (1214031112), we get a palindrome (3325335233).

The spelling of 2111304121 in words is "two billion, one hundred eleven million, three hundred four thousand, one hundred twenty-one".