1201424404021 has 2 divisors, whose sum is σ = 1201424404022. Its totient is φ = 1201424404020.

The previous prime is 1201424404001. The next prime is 1201424404031. The reversal of 1201424404021 is 1204044241021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 663784972900 + 537639431121 = 814730^2 + 733239^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201424404021 - 2¹⁵ = 1201424371253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201424404001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600712202010 + 600712202011.

It is an arithmetic number, because the mean of its divisors is an integer number (600712202011).

Almost surely, 2^{1201424404021} is an apocalyptic number.

It is an amenable number.

1201424404021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201424404021 is an equidigital number, since it uses as much as digits as its factorization.

1201424404021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 1201424404021 its reverse (1204044241021), we get a palindrome (2405468645042).

The spelling of 1201424404021 in words is "one trillion, two hundred one billion, four hundred twenty-four million, four hundred four thousand, twenty-one".