1221140411 has 2 divisors, whose sum is σ = 1221140412. Its totient is φ = 1221140410.

The previous prime is 1221140339. The next prime is 1221140419. The reversal of 1221140411 is 1140411221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221140411 - 2²⁶ = 1154031547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1221140411.

It is not a weakly prime, because it can be changed into another prime (1221140419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610570205 + 610570206.

It is an arithmetic number, because the mean of its divisors is an integer number (610570206).

Almost surely, 2^1221140411 is an apocalyptic number.

1221140411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221140411 is an equidigital number, since it uses as much as digits as its factorization.

1221140411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1221140411 is about 34944.8195159168. The cubic root of 1221140411 is about 1068.8625671887.

Adding to 1221140411 its reverse (1140411221), we get a palindrome (2361551632).

The spelling of 1221140411 in words is "one billion, two hundred twenty-one million, one hundred forty thousand, four hundred eleven".