1144120421 has 2 divisors, whose sum is σ = 1144120422. Its totient is φ = 1144120420.

The previous prime is 1144120399. The next prime is 1144120427. The reversal of 1144120421 is 1240214411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1005587521 + 138532900 = 31711^2 + 11770^2 .

It is a cyclic number.

It is not a de Polignac number, because 1144120421 - 2⁶ = 1144120357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1144120393 and 1144120402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1144120427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572060210 + 572060211.

It is an arithmetic number, because the mean of its divisors is an integer number (572060211).

Almost surely, 2^1144120421 is an apocalyptic number.

It is an amenable number.

1144120421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144120421 is an equidigital number, since it uses as much as digits as its factorization.

1144120421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1144120421 is about 33824.8491644826. The cubic root of 1144120421 is about 1045.9010020408.

Adding to 1144120421 its reverse (1240214411), we get a palindrome (2384334832).

The spelling of 1144120421 in words is "one billion, one hundred forty-four million, one hundred twenty thousand, four hundred twenty-one".