2781114121 has 2 divisors, whose sum is σ = 2781114122. Its totient is φ = 2781114120.

The previous prime is 2781114073. The next prime is 2781114163. The reversal of 2781114121 is 1214111872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1589138496 + 1191975625 = 39864^2 + 34525^2 .

It is a cyclic number.

It is not a de Polignac number, because 2781114121 - 2¹¹ = 2781112073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2781114121.

It is not a weakly prime, because it can be changed into another prime (2781114521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390557060 + 1390557061.

It is an arithmetic number, because the mean of its divisors is an integer number (1390557061).

Almost surely, 2^2781114121 is an apocalyptic number.

It is an amenable number.

2781114121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781114121 is an equidigital number, since it uses as much as digits as its factorization.

2781114121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896, while the sum is 28.

The square root of 2781114121 is about 52736.2695021178. The cubic root of 2781114121 is about 1406.2836798360.

Adding to 2781114121 its reverse (1214111872), we get a palindrome (3995225993).

The spelling of 2781114121 in words is "two billion, seven hundred eighty-one million, one hundred fourteen thousand, one hundred twenty-one".