1421403410021 has 16 divisors (see below), whose sum is σ = 1640913141504. Its totient is φ = 1206016521984.

The previous prime is 1421403410017. The next prime is 1421403410041. The reversal of 1421403410021 is 1200143041241.

It is a cyclic number.

It is not a de Polignac number, because 1421403410021 - 2² = 1421403410017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421403410041) 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 in 15 ways as a sum of consecutive naturals, for example, 1334831 + ... + 2150483.

It is an arithmetic number, because the mean of its divisors is an integer number (102557071344).

Almost surely, 2^{1421403410021} is an apocalyptic number.

It is an amenable number.

1421403410021 is a deficient number, since it is larger than the sum of its proper divisors (219509731483).

1421403410021 is a wasteful number, since it uses less digits than its factorization.

1421403410021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818180.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1421403410021 its reverse (1200143041241), we get a palindrome (2621546451262).

The spelling of 1421403410021 in words is "one trillion, four hundred twenty-one billion, four hundred three million, four hundred ten thousand, twenty-one".