1421688547381 has 2 divisors, whose sum is σ = 1421688547382. Its totient is φ = 1421688547380.

The previous prime is 1421688547337. The next prime is 1421688547441. The reversal of 1421688547381 is 1837458861241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1197383062500 + 224305484881 = 1094250^2 + 473609^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421688547381 - 2⁹ = 1421688546869 is a prime.

It is a super-2 number, since 2×1421688547381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421688542381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710844273690 + 710844273691.

It is an arithmetic number, because the mean of its divisors is an integer number (710844273691).

Almost surely, 2^{1421688547381} is an apocalyptic number.

It is an amenable number.

1421688547381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421688547381 is an equidigital number, since it uses as much as digits as its factorization.

1421688547381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10321920, while the sum is 58.

The spelling of 1421688547381 in words is "one trillion, four hundred twenty-one billion, six hundred eighty-eight million, five hundred forty-seven thousand, three hundred eighty-one".