1241204021399 has 2 divisors, whose sum is σ = 1241204021400. Its totient is φ = 1241204021398.

The previous prime is 1241204021377. The next prime is 1241204021429. The reversal of 1241204021399 is 9931204021421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1241204021399 - 2¹⁶ = 1241203955863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1241204021329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620602010699 + 620602010700.

It is an arithmetic number, because the mean of its divisors is an integer number (620602010700).

Almost surely, 2^{1241204021399} is an apocalyptic number.

1241204021399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241204021399 is an equidigital number, since it uses as much as digits as its factorization.

1241204021399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 1241204021399 in words is "one trillion, two hundred forty-one billion, two hundred four million, twenty-one thousand, three hundred ninety-nine".