1141221421 has 2 divisors, whose sum is σ = 1141221422. Its totient is φ = 1141221420.

The previous prime is 1141221413. The next prime is 1141221467. The reversal of 1141221421 is 1241221411.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1084384900 + 56836521 = 32930^2 + 7539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1141221421 - 2³ = 1141221413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1141221401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 570610710 + 570610711.

It is an arithmetic number, because the mean of its divisors is an integer number (570610711).

Almost surely, 2^1141221421 is an apocalyptic number.

It is an amenable number.

1141221421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1141221421 is an equidigital number, since it uses as much as digits as its factorization.

1141221421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 128, while the sum is 19.

The square root of 1141221421 is about 33781.9688739422. The cubic root of 1141221421 is about 1045.0168784618.

Adding to 1141221421 its reverse (1241221411), we get a palindrome (2382442832).

The spelling of 1141221421 in words is "one billion, one hundred forty-one million, two hundred twenty-one thousand, four hundred twenty-one".