1421235251399 has 2 divisors, whose sum is σ = 1421235251400. Its totient is φ = 1421235251398.

The previous prime is 1421235251389. The next prime is 1421235251477. The reversal of 1421235251399 is 9931525321241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1421235251399 - 2¹² = 1421235247303 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421235251329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710617625699 + 710617625700.

It is an arithmetic number, because the mean of its divisors is an integer number (710617625700).

Almost surely, 2^{1421235251399} is an apocalyptic number.

1421235251399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421235251399 is an equidigital number, since it uses as much as digits as its factorization.

1421235251399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 47.

The spelling of 1421235251399 in words is "one trillion, four hundred twenty-one billion, two hundred thirty-five million, two hundred fifty-one thousand, three hundred ninety-nine".