120021427 has 2 divisors, whose sum is σ = 120021428. Its totient is φ = 120021426.

The previous prime is 120021413. The next prime is 120021439. The reversal of 120021427 is 724120021.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (724120021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120021427 - 2²³ = 111632819 is a prime.

It is not a weakly prime, because it can be changed into another prime (120021457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010713 + 60010714.

It is an arithmetic number, because the mean of its divisors is an integer number (60010714).

Almost surely, 2^120021427 is an apocalyptic number.

120021427 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021427 is an equidigital number, since it uses as much as digits as its factorization.

120021427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 120021427 is about 10955.4291107195. The cubic root of 120021427 is about 493.2717706334.

Adding to 120021427 its reverse (724120021), we get a palindrome (844141448).

The spelling of 120021427 in words is "one hundred twenty million, twenty-one thousand, four hundred twenty-seven".